(Updated October 2026. USD figures are converted at USD/JPY = 150 for reference.)
The number of electroplating establishments in Japan has declined for two decades, while their shipments have stayed in the range of ¥400bn to ¥500bn (~USD 2.7bn to 3.3bn). Recent Japan plating and surface treatment M&A shows three patterns. Holding companies built to acquire owner-run manufacturers facing succession issues, both now listed, have acquired plating and surface treatment companies, mainly in Aichi and Gifu prefectures. In 2026, two parts manufacturers agreed to acquire surface treatment businesses. In plating chemicals, a US industrial chemicals company acquired a Japanese plating chemicals maker from a Japanese private equity fund in 2025.
This article is written for corporate development and international business development teams at foreign companies that see Japan as an acquisition market, a source of partners, or a source of acquirers for their own businesses. It reviews the market structure, the industry landscape, domestic consolidation, foreign capital in Japanese plating and surface treatment, Japanese surface treatment companies’ transactions abroad, the industry-specific factors acquirers examine, and the implications for overseas acquirers.
1. Market Structure — Declining Establishments and Drivers of Consolidation
Industry scope
This article covers three categories of the Japan Standard Industrial Classification: electroplating (2464), hot-dip plating (2462), and other metal surface treatment (2469), including anodizing, thermal spraying, electrolytic polishing and rust-prevention treatment. Electroplating, for example, is defined as establishments that mainly electroplate metal products supplied by others; steelmakers producing coated steel are classified elsewhere and are excluded. Metal product painting (2461), metal engraving (2463) and metal heat treatment (2465) belong to the same minor group but are outside the scope of this article.
The article also covers makers of plating chemicals and surface treatment equipment. In this article, “surface treatment processors” refers to contract treatment companies, and “plating chemicals makers” to chemical suppliers. These companies are classified under chemicals and machinery, and their figures are not included in the statistics below.
Market size
The 2025 Economic Structure Survey by the Ministry of Economy, Trade and Industry (METI) gives the following figures. Establishments and employees are as of June 1, 2025; shipments are for calendar 2024 (METI 2025 Economic Structure Survey, manufacturing establishments by industry).
| Category | Establishments | Employees | Shipments |
|---|---|---|---|
| Electroplating (2464) | 1,016 | 27,459 | ¥493bn (~USD 3.3bn) |
| Other metal surface treatment (2469) | 1,705 | 31,487 | ¥715bn (~USD 4.8bn) |
| Hot-dip plating (2462) | 136 | 5,626 | ¥129bn (~USD 860mn) |
| Reference: metal product painting (2461) | 1,425 | 22,229 | ¥304bn (~USD 2.0bn) |
| Reference: metal heat treatment (2465) | 640 | 15,642 | ¥316bn (~USD 2.1bn) |
In METI’s Census of Manufacture, which covered establishments with 4 or more employees, the number of electroplating establishments fell from 1,489 in 2004 to 1,162 in 2014 and 1,070 in 2019. Shipments in those years were ¥437bn, ¥417bn and ¥478bn (~USD 2.9bn, 2.8bn and 3.2bn). The June 2025 figure of 1,016 establishments covers establishments of all sizes, so a direct comparison with earlier years understates the decline.
The industry association’s membership is also smaller. The All Japan Plating Federation (Zentoren) reported 1,878 member companies with 29,999 employees in April 2005, and 1,107 member establishments with 24,675 employees across 22 regional cooperatives in April 2026 (the 2005 figure counts companies and the 2026 figure counts establishments, and neither is defined in the same way as the government statistics).
Most establishments are small. Of the 1,016 electroplating establishments as of June 2025, 779 (about 77%) had 29 or fewer employees, and 48 had 100 or more.
Demand segments
Plating and surface treatment add functions such as corrosion resistance, wear resistance, conductivity and appearance to customers’ parts. The type of treatment and the customer base differ by end market. We could not find government or industry statistics on the breakdown of sales by end market, so the table below summarizes developments by segment from the disclosures of the companies covered in this article.
| End market | Main treatments | Developments in the cases and disclosures |
|---|---|---|
| Automotive | Zinc plating and other rust-prevention treatments, decorative plating including plating on plastics, functional plating | Dipsol’s plating chemicals serve mainly automotive and other industrial applications. Serendip Holdings expected Surtec Kariya to expand sales to automotive electronics suppliers and to overseas automakers. JCU reported flat FY2026/3 sales of decorative plating chemicals in Japan, partly due to changing design trends |
| Electronic components and semiconductor packaging | Precious metal, tin, nickel and copper plating | JCU reported a substantial year-on-year increase in FY2026/3 sales of plating chemicals for semiconductor package substrates in Taiwan |
| Semiconductor and flat panel display (FPD) equipment | Thermal spraying, anodizing, plating | Tocalo’s semiconductor and FPD segment generated ¥24.8bn (~USD 165mn), or 42.4% of consolidated revenue, in FY2026/3. Two acquirers cited semiconductor equipment among their purposes (Cases 2 and 4) |
| Steel, industrial machinery and infrastructure | Thermal spraying, hot-dip galvanizing, conversion coating | Tocalo cited Thailand’s position as an important thermal spraying market with steelmakers as a reason for taking full ownership of its Thai joint venture (Case 9). The customers of Mitaka Kinzoku Kogyo’s plating business include major industrial equipment makers serving power and social infrastructure |
| Defense | Conversion coating of aluminum alloys and others | Daiei Parker treats products for defense applications |
Five drivers of consolidation
- Fewer establishments and consolidation of capacity — The number of electroplating establishments continues to decline while shipments have held. In 2026, Fuji Mekki Kogyosho, a subsidiary of Seiwa Holdings, took over the plating business of Mitaka Kinzoku Kogyo, which had large plating lines but low utilization due to staff shortages, and expected to increase its own production capacity by about 35% (Case 2). As establishments decline, some operators are expanding capacity by taking over equipment that other companies can no longer run at full utilization.
- Tighter wastewater regulation — Japan tightened the national effluent standard for zinc under the Water Pollution Control Act from 5 mg/L to 2 mg/L in December 2006, with provisional standards for industries unable to comply immediately. The scope of the provisional standard narrowed with each extension. Since December 2021, electroplating has been the only industry covered, at 4 mg/L, and in December 2024 this provisional standard was extended to December 10, 2029. The standard for hexavalent chromium compounds was tightened from 0.5 mg/L to 0.2 mg/L on April 1, 2024, with a provisional standard of 0.5 mg/L applied to electroplating for 3 years from that date (Ministry of the Environment press release, November 2024, zinc provisional standard; Ministry of the Environment press release, January 2024, hexavalent chromium). Under the Chemical Substances Control Law, PFOS (2010), PFOA (2021) and PFHxS (2024) were designated as Class I Specified Chemical Substances, and imports of plating surface treatment agents and their additives containing PFOS are prohibited. Compliance can require investment in wastewater treatment and changes in chemicals, and whether to fund that investment independently or within a larger group can become one of the questions an owner considers.
- Staffing and capacity to invest — In the transfer of Mitaka Kinzoku Kogyo’s plating business, the disclosed background was low utilization caused by staff shortages and limited capacity for further investment. Seiwa Holdings stated that it would hire staff and invest in equipment after the transfer. Running the equipment under an owner with the staff and capital to invest was one of the purposes of this transaction.
- Semiconductor-related demand — Tocalo’s medium-term plan, TOCALO2030 (FY2027/3 to FY2031/3), targets semiconductor and FPD revenue of ¥45bn (~USD 300mn), up from ¥24.8bn in FY2026/3. In 2026, Marumae agreed to acquire ULVAC Techno’s aluminum surface treatment business, partly to develop surface treatment technology for semiconductor manufacturing equipment (Case 4), and Seiwa Holdings cited semiconductor-related demand as one of the benefits of acquiring Mitaka Kinzoku Kogyo’s plating business (Case 2). Companies and businesses with treatment technology and equipment for semiconductor applications have become acquisition targets.
- Business succession — According to Japan’s Small and Medium Enterprise Agency (SME Agency), 986,000 SMEs, or 32.6% of the 3.02 million SMEs covered by the Basic Survey of Small and Medium Enterprises, had owners aged 70 or older as of June 2023 (SME Agency, Direction for Reform of the SME M&A Market, May 2025). Voluntary closures and dissolutions rose from 33,475 in 2014 to 62,695 in 2024, and about half of the companies closed were profitable (SME Agency, materials on family succession, June 2025). In plating and surface treatment, disclosed transactions include a sale driven by the absence of a successor (Daiei Parker in Case 2), a family succession combined with fund investment (Case 3), and an acquisition, for business succession, of shares held by a company president (Case 1).
2. Industry Landscape
Listed surface treatment processors
| Company | Headquarters | Consolidated revenue | Main fields and recent moves |
|---|---|---|---|
| Nihon Parkerizing | Chuo-ku, Tokyo | ¥138bn (~USD 920mn), FY2026/3 | Chemicals, equipment and processing for conversion coating; processing revenue of ¥48.6bn (~USD 324mn). Acquired Japan Kanigen in 2002. Its fifth medium-term plan lists “exploring M&A to expand the business portfolio” |
| Tocalo | Chuo-ku, Kobe | ¥58.5bn (~USD 390mn), FY2026/3 | Surface modification centered on thermal spraying; semiconductor and FPD account for 42.4% of revenue. TOCALO2030 states that it will consider M&A as needed for growth |
| Sanno | Kohoku-ku, Yokohama | ¥15.5bn (~USD 103mn), FY2026/7 | Precious metal surface treatment and precision stamping, with a production base in the Philippines |
Nihon Parkerizing has also reorganized processing within its group. It made its processing subsidiary Parker Kako wholly owned through a share exchange in 2024, transferred the parent company’s own processing business to that subsidiary through an absorption-type split in April 2026, and renamed the subsidiary Parker Processing.
Listed plating chemicals makers
| Company | Headquarters | Consolidated revenue | Main fields and recent moves |
|---|---|---|---|
| C. Uyemura & Co. | Chuo-ku, Osaka | ¥91.8bn (~USD 612mn), FY2026/3 | Plating chemicals, surface treatment equipment and plating services. Entered Hong Kong, Taiwan, Thailand and Shenzhen (China) through joint ventures |
| JCU | Taito-ku, Tokyo | ¥29.7bn (~USD 198mn), FY2026/3 | Plating chemicals for printed wiring boards, electronic components, semiconductors, automotive parts and building materials, and related equipment |
| Ishihara Chemical | Hyogo-ku, Kobe | ¥23.5bn (~USD 157mn), FY2026/3 | Tin and copper plating solutions and other products. Acquired Kizai in 2019 (Case 7) |
Succession-focused holding companies with surface treatment subsidiaries
Two holding companies have acquired surface treatment companies for business succession. Serendip Holdings (Naka-ku, Nagoya; Tokyo Stock Exchange (TSE) Growth) acquired Surtec Kariya (Kariya, Aichi) in 2025 and reported consolidated revenue of ¥51.2bn (~USD 341mn) for FY2026/3. Seiwa Holdings (Naka-ku, Nagoya; listed on TSE Growth in March 2026) added Toei Coating (2019) and Fuji Mekki Kogyosho (2024) in plating before its listing, and Daiei Parker (2026) in conversion coating after it. It reported revenue of ¥8.0bn (~USD 53mn) under IFRS for FY2026/5.
Surface treatment companies within corporate groups
Corporate groups also hold surface treatment companies. Examples include Japan Kanigen (electroless nickel plating), wholly owned by Nihon Parkerizing, and Air Water NV (Amagasaki, Hyogo), a group company of Air Water focused on surface treatment for steel materials. Within the ULVAC group, ULVAC Techno runs an aluminum surface treatment business in Izumi, Kagoshima, and announced its transfer to Marumae effective September 1, 2026 (Case 4). Plating chemicals maker Dipsol, previously owned by a Japanese fund, has been part of Quaker Houghton since 2025 (Case 8).
Owner-run companies
Many of Japan’s non-listed plating and surface treatment companies are run by founding families. In the cases covered here, Shiragane Mekki Kogyo (Nagoya; established 1949) accepted fund investment after a parent-to-child succession, Daiei Parker (Kawasaki; established 1981) joined Seiwa Holdings against the background of having no successor, and Mitaka Kinzoku Kogyo (Ama, Aichi) sold its plating business. Non-listed companies disclose limited information, and identifying them requires research beyond public databases.
Regional concentration
As of June 2025, the prefectures with the most electroplating establishments were Tokyo (155), Osaka (142), Aichi (106), Saitama (88) and Kanagawa (46). By 2024 shipments, the top prefectures were Aichi (¥57.3bn, ~USD 382mn), Osaka (¥45.7bn, ~USD 305mn), Saitama (¥40.6bn, ~USD 271mn), Tokyo (¥40.0bn, ~USD 267mn) and Nagano (¥36.1bn, ~USD 241mn) (METI 2025 Economic Structure Survey, statistics by region). Of the domestic targets covered in this article, Surtec Kariya (Kariya), Shiragane Mekki Kogyo (Nagoya), Mitaka Kinzoku Kogyo (Ama) and Fuji Mekki Kogyosho (Inuyama, Aichi and Kakamigahara, Gifu) are located in Aichi or Gifu, and both acquiring holding companies are headquartered in Nagoya. In the Kansai region, C. Uyemura (Osaka), Tocalo and Ishihara Chemical (Kobe) and Air Water NV (Amagasaki) have their headquarters.
3. Domestic Consolidation — Owner Exits and Process Insourcing
Case 1: Serendip Holdings and Surtec Kariya (2025) — A succession-focused holding company acquires a president-owned processor
On May 13, 2025, Serendip Holdings resolved to acquire all shares of Surtec Kariya (Kariya, Aichi; established 1954), a plating and surface treatment processor, for cash through its special purpose company (SPC) Serendip SPC No. 2, and completed the acquisition on July 1, 2025. The seller was Surtec Kariya’s president, and Serendip states in its securities report that the purpose of the acquisition was business succession. Surtec Kariya treats metal surfaces to add heat resistance, wear resistance and corrosion resistance, and has production sites in Japan, Thailand, Indonesia, Vietnam, the Philippines and Mexico. Its non-consolidated revenue exceeds ¥10bn (~USD 67mn) on a value-added basis, excluding the value of materials that customers sell to it for processing. The acquisition was partly financed by mezzanine investment from the Development Bank of Japan and Shoko Chukin Capital.
Although the shares were acquired for cash, Serendip Holdings also allotted 62,100 treasury shares (about ¥200mn, ~USD 1.3mn) to the selling president, who paid for them with part of the sale proceeds. Serendip described this allotment as part of the effective consideration for the acquisition. At the time of the acquisition, Serendip expected five synergies: sales to automotive electronics suppliers and automakers beyond existing customers; new business with overseas automakers; packaged proposals combining metalworking and surface treatment; expansion of production sites, including through M&A; and productivity gains through automation. In FY2026/3, Serendip consolidated eight companies, Surtec Kariya and its subsidiaries, for the first time.
This transaction shows that (i) the buyer of an owner-held surface treatment company with several overseas plants was a listed succession-focused holding company rather than a competitor, (ii) the seller reinvested part of the proceeds in the buyer’s shares and remained connected to the group as a shareholder, and (iii) mezzanine capital from the Development Bank of Japan and Shoko Chukin Capital funded part of the acquisition.
Case 2: Seiwa Holdings and Fuji Mekki Kogyosho, Mitaka Kinzoku Kogyo’s plating business and Daiei Parker (2024–2026) — Serial acquisitions by a succession platform
Seiwa Holdings acquires small and medium-sized manufacturers without successors and holds them permanently. In its securities report, it states that, as a rule, it targets companies at an EV/EBITDA multiple of 5x or less. In its FY2026/5 third-quarter results briefing, it described its focus as companies with EBITDA of ¥100mn to ¥300mn (~USD 0.7mn to 2mn). In plating and surface treatment, Seiwa added Toei Coating (Gifu) in 2019, and in November 2024 acquired all shares of Fuji Mekki Kogyosho (Inuyama, Aichi and Kakamigahara, Gifu), a plating company serving makers of semiconductor manufacturing equipment and machine tools, through an SPC.
In June 2026, Fuji Mekki Kogyosho took over the plating business of Mitaka Kinzoku Kogyo (Ama, Aichi). Mitaka had large plating equipment and many production lines, but utilization had fallen due to staff shortages and limited capacity for further investment. Seiwa expected the transfer to increase Fuji Mekki Kogyosho’s production capacity by about 35%, to provide a production base for growing semiconductor-related demand, to bring in a customer base that includes major industrial equipment makers serving power and social infrastructure, and to allow joint sales and logistics with Seiwa group plants within 30 km.
In August 2026, Seiwa added Daiei Parker (Kawasaki; established 1981), a specialist in conversion coating of aluminum alloy products, as a wholly owned subsidiary. Daiei Parker treats products for defense applications and faced the absence of a future successor; Seiwa stated that the company’s technology and employment would be carried forward within its group. Seiwa cited the technical overlap between conversion coating and the group’s plating and electrodeposition coating, the sharing of quality control know-how required for defense applications, joint purchasing of chemicals and materials, and joint logistics with its three electrodeposition coating plants in the Kanto region.
These transactions show that (i) a succession platform has built up plating and surface treatment companies and equipment, centered on Aichi and Gifu and extending to the Kanto region, through a combination of share acquisitions and business transfers, (ii) the buyer has disclosed its valuation guideline (EV/EBITDA of 5x or less), and (iii) the sellers’ disclosed circumstances include not only the absence of successors but also staff shortages and limited capacity to invest.
Case 3: Japan Monozukuri Business Succession Fund No. 1 and Shiragane Mekki Kogyo (2023) — Family succession combined with fund investment
Japan Monozukuri Business Succession Fund No. 1 (established February 2023, first close ¥5.1bn, ~USD 34mn) is managed by a company jointly established by Shinsei Corporate Investment and Serendip Financial Service. In July 2023, the fund invested in Tsukasa Kako, the parent of Shiragane Mekki Kogyo (Moriyama-ku, Nagoya; established 1949), and agreed on a capital and business alliance with Shiragane’s president. Shiragane began plating on plastics in 1966 and provides plating on plastics and metals, painting, molding and assembly. The investment followed the succession from the former president to his eldest son and was the fund’s first investment. The stake was not disclosed. The stated plans were to strengthen relationships with existing customers and to expand business outside the automotive sector.
This transaction shows that (i) even in a family succession, fund investment was used to address succession issues, and (ii) the founding family continues to manage the company under a capital and business alliance rather than a sale of all shares.
Case 4: Marumae and ULVAC Techno’s aluminum surface treatment business (2026) — A parts maker takes over a corporate group’s surface treatment business
On August 28, 2026, Marumae (Izumi, Kagoshima; TSE Prime), a maker of vacuum components for semiconductor and FPD manufacturing equipment, announced that it would take over, effective September 1, the aluminum surface treatment business of ULVAC Techno (Chigasaki, Kanagawa), a wholly owned subsidiary of ULVAC, limited to the Izumi plant. The business generated revenue of ¥264mn (~USD 1.8mn) in the year to June 2026, and the price was not disclosed. Marumae cited stronger integrated production capability and the development of surface treatment technology for semiconductor manufacturing equipment. Marumae expected its revenue to remain unchanged, with lower outsourced processing costs and higher fixed costs; the reduction in outsourced processing costs indicates that Marumae had been using this business for surface treatment. The business had been transferred within the ULVAC group from ULVAC Kyushu to ULVAC Techno in 2010.
This transaction shows that (i) a non-core surface treatment business of a large group, after a transfer within the group, was sold to a company outside the group, (ii) the buyer was not a surface treatment company but a parts maker that had used the business for its own treatment, seeking stronger integrated production and new technology, and (iii) the transaction took the form of a transfer of a single-plant business rather than a company.
Case 5: Rhythm and Totec’s plating business (2026) — Insourcing through a corporate split and share acquisition
On July 24, 2026, Rhythm, which runs a precision components business, resolved to acquire the shares of Rhythm Totec, a new company to which Totec (Chiba) would transfer its plating business, including tin and nickel plating, through an incorporation-type split. Rhythm cited improvements in quality, cost and delivery in its precision components business and a stronger supply chain. In September 2026, Rhythm disclosed the completion of the share acquisition.
This transaction shows that (i) as in Case 4, a parts maker, rather than a surface treatment company, acquired a plating business, and (ii) the seller carved out only its plating business into a new company and sold that company.
Case 6: Air Water NV and MFK (2024) — A surface treatment company adds a new type of treatment
On September 30, 2024, Air Water NV (Amagasaki, Hyogo), a group company of Air Water focused on surface treatment for steel materials, acquired 70% of MFK (Hidaka, Saitama; established 1991; 33 employees) and renamed it Air Water MFK. MFK provides hard anodizing, precision cleaning and electrolytic and chemical polishing, and reported revenue of ¥515mn (~USD 3.4mn) for the year to September 2023. It developed a functional anodic coating that reduces the cracking caused by the low heat resistance of conventional anodizing, and the coating has been well received by semiconductor equipment makers and others. Air Water aims to combine MFK’s technology with its surface treatment for steel materials, broaden its range of treatments in anticipation of demand related to electric vehicles (EVs) and autonomous driving, and expand its sales channels.
This transaction shows that (i) a surface treatment company used an acquisition to add a type of treatment it lacked (anodizing), together with technology well received by semiconductor equipment makers, and (ii) the buyer took 70% rather than all shares.
Case 7: Ishihara Chemical and Kizai (2019) — A plating chemicals maker acquires an owner-held peer
In September 2019, Ishihara Chemical, a maker of tin and copper plating solutions and other products, announced the acquisition of all shares of Kizai (Chuo-ku, Tokyo; established 1959), a developer, manufacturer and seller of surface treatment chemicals for metals and plastics, from its major individual shareholders. Kizai reported revenue of ¥1.35bn (~USD 9mn), operating profit of ¥117mn (~USD 0.8mn) and net assets of ¥1.84bn (~USD 12mn) for FY2019/3. Ishihara Chemical cited Kizai’s standing in the decorative plating market, where Ishihara was not present, and the opportunity to strengthen its proposals and technical support and create a new customer base. The price was not disclosed under a confidentiality agreement with the sellers.
This transaction shows that (i) in plating chemicals as well, a company owned by individual shareholders was sold to a listed peer, and (ii) the buyer valued the target’s track record and customers in a market it did not serve (decorative plating).
4. Foreign Capital in Japanese Plating and Surface Treatment — Out-In Transactions
This section covers Out-In transactions, meaning acquisitions of or investments in Japanese companies by foreign companies.
Case 8: Quaker Houghton and Dipsol (2025) — A US industrial chemicals company acquires a fund-owned Japanese plating chemicals maker
On March 25, 2025, Quaker Houghton, a US industrial chemicals company listed on the New York Stock Exchange, signed an agreement to acquire Dipsol Chemicals (established 1953), a Japanese supplier of surface treatment and plating chemicals and services, for ¥23bn (~USD 153mn). The acquisition was completed on April 1, 2025, and was funded with borrowings under Quaker Houghton’s existing credit facility.
Quaker Houghton disclosed a multiple of about 10.5x Dipsol’s estimated adjusted EBITDA (about USD 15mn) for the trailing 12 months. Dipsol’s revenue for the 12 months ended December 31, 2024 was about USD 82mn, it had about 450 employees, and it operated production and R&D sites in Asia, North America and Europe. Its products serve mainly automotive and other industrial applications.
The seller was Aspirant Group, a Japanese private equity firm. The transaction was structured as a sale of the shares of an Aspirant SPC that indirectly held Dipsol. During its ownership, Aspirant worked on optimizing Dipsol’s global production sites, reducing costs, and expanding sales in overseas markets. In announcing the sale, Aspirant described Dipsol’s business as complementary to Quaker Houghton’s strategic core areas, and stated that Quaker Houghton valued Dipsol’s differentiated technology and its market position with major Japanese automakers.
Quaker Houghton stated that Dipsol’s product technologies complement its technical service model, that the acquisition helps expand its advanced solutions businesses in end markets with solid growth characteristics, and that Dipsol provides significant cross-selling opportunities.
This transaction shows that (i) a foreign strategic buyer provided the exit for a Japanese fund that owned a Japanese plating chemicals maker, (ii) the target was a Japanese company with its own production and R&D sites in Asia, North America and Europe, and (iii) the buyer disclosed both the price and the multiple of adjusted EBITDA.
The multiple of about 10.5x can be compared with the valuation guideline that Seiwa Holdings, a domestic buyer of plating processors, discloses (EV/EBITDA of 5x or less as a rule; Case 2). The two differ in business model (manufacturing and selling chemicals versus contract processing) and in scale, and the comparison does not indicate the price a given company would command. It does show that, in Japan plating and surface treatment M&A, a domestic buyer of owner-run processors has published its valuation guideline, which foreign acquirers considering processors can use as one reference point.
Other foreign entries
In our research, we did not find any disclosed acquisition of a Japanese plating or surface treatment processor by a foreign company. Foreign capital in this industry, as confirmed through primary sources, is concentrated in plating chemicals. For foreign companies considering entry into Japanese surface treatment processing, the domestic transactions in Section 3 indicate the types of targets that have changed hands: owner-held processors (Cases 1 and 2), surface treatment businesses carved out of corporate groups (Case 4), and specialized processors with technology valued by semiconductor equipment makers (Case 6).
5. Japanese Surface Treatment Companies Abroad — In-Out Transactions
This section covers In-Out transactions, meaning acquisitions abroad by Japanese companies. For overseas companies, Japanese surface treatment processors and plating chemicals makers are potential acquirers of their businesses and potential partners. Their transactions abroad show what they buy and on what criteria. In the cases we confirmed, Japanese companies have expanded abroad mainly through new subsidiaries and joint ventures, and their acquisitions abroad have mainly been purchases of joint venture partners’ stakes.
Case 9: Tocalo and NEIS & TOCALO (Thailand) (2024) — Buying out a joint venture partner
In October 2012, Tocalo established NEIS & TOCALO (Thailand), a thermal spraying and welding company in Chonburi, as a joint venture with the NEIS group, and held 49.0%. In July 2024, Tocalo acquired the partner’s 51.0% stake (86,700 shares), took full ownership, and renamed the company TOCALO Surface Technology (Thailand). Tocalo stated that Thailand, with its steelmakers, is an important market for its thermal spraying business, and that it would concentrate management resources on thermal spraying to expand its business there.
Under TOCALO2030, Tocalo plans to expand in Southeast Asia, centered on Thailand, Indonesia, Malaysia and Singapore, and to strengthen production capacity in the United States through TOCALO USA-Arizona, established in September 2025, among others. The US site was established as a new subsidiary rather than acquired. The plan states that Tocalo will consider M&A as needed for growth, alongside growth investment of ¥40bn to ¥60bn (~USD 267mn to 400mn) over 5 years.
This transaction shows that (i) a Japanese surface treatment company consolidated a business it had entered through a joint venture by buying out its partner, and (ii) the stated reason was the presence of its customers, steelmakers, in the market.
Case 10: C. Uyemura and Sum Hitechs (2015) — Buying out the remaining shareholder of a Thai joint venture
C. Uyemura established Sum Hitechs (Pathum Thani, Thailand) in 1987 as a joint venture. The company provides plastic molding, painting and plating for automotive and home appliance parts, as well as plating of printed circuit boards. In August 2015, C. Uyemura, holding 83.65%, acquired the remaining 16.35% (170,040 shares) from Thai Stanley Electric, a listed Thai company, for THB 290mn (about ¥1.02bn, ~USD 7mn), taking full ownership. It cited closer coordination within the group and a stronger management structure to respond quickly to changes in its business environment.
This transaction shows that (i) a Japanese plating chemicals maker also runs plating services abroad through joint ventures, and (ii) there are disclosed examples of the price paid for a local partner’s stake.
Methods of overseas expansion
Japanese listed surface treatment processors and plating chemicals makers have expanded abroad mainly through new subsidiaries and joint ventures. Nihon Parkerizing has a joint venture in Taiwan and established subsidiaries in the United States, Thailand, India and China. JCU established subsidiaries across Asia, in the United States and in Mexico, and took full ownership of its Indian (2014) and Mexican (2020) subsidiaries through additional share purchases. C. Uyemura entered Hong Kong, Taiwan, Thailand and Shenzhen through joint ventures. Based on the corporate histories in its securities reports, Nihon Parkerizing’s acquisitions have all been domestic. Across Japanese listed surface treatment processors and plating chemicals makers, acquisitions of overseas companies from third parties were limited in our research.
Overseas sites can also come with domestic acquisitions. Surtec Kariya, acquired by Serendip Holdings (Case 1), has subsidiaries in Thailand, Indonesia, Vietnam, the Philippines and Mexico, and Serendip’s expected synergies included new business with overseas automakers.
6. Industry-Specific Factors Examined by Acquirers
In acquisitions of Japanese plating and surface treatment companies, acquirers examine industry-specific factors in addition to financials. Based on the reasons and expected benefits disclosed by the acquirers in the cases above, these factors fall into three groups.
- Treatment technology and quality control — Which treatments (electroplating, electroless plating, anodizing, conversion coating, thermal spraying and others) the company can perform, on which materials and for which applications, and at what quality level. The acquirer in Case 6 cited a functional anodic coating that reduces cracking; the acquirer in Case 7 cited a track record in decorative plating; and the acquirer in Case 2 cited quality control know-how for defense applications and the technical overlap between conversion coating and plating and electrodeposition coating.
- Customers and end markets — The customer mix, the range of treatments approved by customers, and complementarity with the acquirer’s customers. The acquirer in Case 2 cited Mitaka Kinzoku Kogyo’s customer base of major industrial equipment makers; the acquirer in Case 1 cited sales to automotive electronics suppliers and overseas automakers; and the acquirer in Case 8 cited cross-selling opportunities. In Case 9, the presence of steelmaker customers in the market was the reason for the acquisition.
- Production: equipment, sites, staff and wastewater treatment — The types and size of treatment lines, utilization, plant locations and skilled staff. In Case 2, large plating equipment and lines were expected to increase capacity by about 35%, with joint sales and logistics with nearby plants. The acquirer in Case 4 sought stronger integrated production, and the acquirer in Case 5 sought improvements in quality, cost and delivery and a stronger supply chain. Given the tighter wastewater regulation described in Section 1, we expect the condition of wastewater treatment facilities and compliance with effluent standards to be among the items acquirers examine.
7. Implications for Overseas Acquirers
Target universe
In Japan plating and surface treatment M&A, the targets in the domestic cases were owner-held processors (Cases 1, 2 and 3), an owner-held plating chemicals maker (Case 7), surface treatment businesses carved out of a corporate group or of a non-listed company (Cases 4 and 5), and specialized processors with technology valued by semiconductor equipment makers (Case 6). The targets were located in Aichi, Gifu, Kanagawa, Saitama, Chiba, Kagoshima and Tokyo, and all were non-listed. About 77% of electroplating establishments have 29 or fewer employees. Identifying such targets requires research beyond public databases, and approaching them requires direct contact with owners and parent companies, in Japanese.
Transaction structures
The cases show several structures: acquisitions of all shares (Cases 1, 2 and 7), a 70% stake (Case 6), fund investment through a capital and business alliance with the family continuing to manage the company (Case 3), transfers of a plating or surface treatment business alone (the Mitaka business in Case 2, and Case 4), and acquisitions of a new company formed through a corporate split (Case 5). In Case 1, the seller reinvested part of the proceeds in the buyer’s shares. One domestic succession platform, Seiwa Holdings, has disclosed its valuation guideline (Case 2). The appropriate structure depends on the owner’s or parent company’s intentions and on the acquirer’s integration plan.
What sellers emphasize
The sellers’ disclosed circumstances concern the continuity of the business: the absence of a future successor (Daiei Parker in Case 2), staff shortages and limited capacity to invest (Mitaka Kinzoku Kogyo in Case 2), and a parent-to-child succession (Case 3). In the one case where the seller made its own statement, Aspirant Group, the fund seller in Case 8, emphasized the fit between Dipsol’s business and the buyer’s strategic core areas, and the buyer’s assessment of Dipsol’s technology and its position with major Japanese automakers. On the buyer side, the disclosures pair the transaction with plans for continuity: hiring and capital investment (Mitaka in Case 2), carrying forward technology and employment (Daiei Parker in Case 2), and stronger relationships with existing customers (Case 3). In these cases, acquirers disclosed how they would continue the business, its employees and its customer relationships alongside the transaction terms.
8. Syntax Partners
Syntax Partners is a Japan-based M&A advisory firm that acts solely as financial advisor. In any transaction, we advise one side only, either the buyer or the seller. We advise on Japan plating and surface treatment M&A, as part of our work in manufacturing and materials, in both domestic and cross-border transactions.
Buy-side advisory
For foreign investors considering acquisitions or capital alliances in Japan, we support the full process: mapping targets based on your strategy, including non-listed owner-run companies and businesses within Japanese corporate groups; approaching owners and parent companies directly; negotiation; and execution. We work in Japanese and English, among other languages.
Sell-side advisory
As an advisor that maximizes the interests of sellers and owners, we support Japanese owners and parent companies considering a sale or business succession. The buyer universe we cover includes not only Japanese surface treatment companies but also parts makers that use surface treatment in their processes, succession-focused holding companies, funds, and overseas strategic buyers such as chemicals and surface treatment groups. Our transaction support draws on our understanding of the industry, including customer approvals by type of treatment, customer relationships by end market, and the condition of equipment and wastewater treatment.
We welcome discussions at any stage, from early-stage exploration of acquisitions or partnerships in Japan to live transactions.
This article was prepared by Syntax Partners, Inc. based on public information, including companies’ official announcements, IR materials and government statistics.