What Electroplating Engineers ofJapan does

EEJA株式会社 (Electroplating Engineers of Japan) is a Japanese specialty chemicals and plating-equipment company founded in 1965 as a 50/50 joint venture between Tanaka Kikinzoku Kogyo K.K. and Enthone Inc. (formerly Sel-Rex Corp., USA). Since 2019 it has been a wholly-owned subsidiary of Tanaka Kikinzoku Kogyo K.K., operating within the broader Tanaka Precious Metals conglomerate and selling through Tanaka's global distribution network across East Asia, the US, Europe, India, and Southeast Asia. EEJA specializes in precious metal electroplating processes — gold, silver, palladium, platinum, rhodium, iridium, and ruthenium, plus supporting copper, nickel, and indium chemistries — supplying both electrolytic and electroless cyanide and non-cyanide formulations, pre/post treatment agents, and a proprietary direct-patternable plating technology called SEADCAT for semiconductor packaging substrates.

The company's revenue model combines sale of plating chemicals, sale of plating equipment (manufactured by its wholly-owned subsidiary EEJA Technologies Ltd., formerly Mitomo Semicon Engineering), and precious metal recycling services through a closed-loop recovery-and-refining system. Customer segments are concentrated in semiconductor manufacturers, advanced packaging (wafer bumping, RDL, TSV), electronic component makers (connectors, lead frames, sensors), and decorative platers. EEJA maintains manufacturing at Hiratsuka (chemicals) and at Joso plus Itami (equipment), sales offices across Tokyo, Nagoya, Osaka, Fukuoka, and Kyoto, and overseas technical laboratories in Hsinchu, Taiwan and Incheon, Korea. Distribution is enterprise-direct via sales representatives and trade show engagement (notably Nepcon Japan), with channel reach amplified through the Tanaka group's international offices. EEJA holds ISO 9001, ISO 14001, and ISO 45001 certifications and adheres to the parent group's GDPR and responsible mineral sourcing policies.

EEJA is led by President and Representative Director Michimasa Dommae (道前 彰彦), supported by 127 employees at EEJA Ltd. as of December 2025 and 55 at EEJA Technologies Ltd. as of April 2026. The company has pursued a consistent strategy of consolidating its chemicals and equipment businesses under the EEJA brand (rebranded 2022, with Mitomo Semicon Engineering renamed EEJA Technologies Ltd. effective April 2026), opening a new Itami Factory in May 2025, and maintaining a steady cadence of new product introductions targeting advanced semiconductor packaging and high-reliability electronic component plating.

Name

Electroplating Engineers ofJapan

Legal name

EEJA株式会社

Website

https://eeja.com

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

1–10 employees

Short description

EEJA株式会社 is a Japanese precious-metal plating chemicals and equipment company, wholly-owned by Tanaka Kikinzoku Kogyo, serving semiconductor, electronic component, connector, lead frame, and decorative manufacturers with integrated chemistry, equipment, and recycling services across Asia-Pacific.

Ownership category

akta.pro rank

Headquarters

HQ city

Shinmachi

HQ country

Japan

HQ region

Asia

Offices10 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Plating Chemicals Sales: Sale of precious metal plating chemicals including gold, silver, palladium, platinum, rhodium, and other precious metal plating solutions. Products include both cyanide and non-cyanide formulations, pretreatment agents, strippers, and sealing agents.
2. Plating Equipment Sales: Sale of plating equipment through subsidiary EEJA Technologies Ltd. Products include wafer plating equipment (POSFER series), connector plating equipment, lead frame plating equipment, and carrier type plating equipment.
3. Precious Metal Recycling Services: Recovery and recycling of precious metals from plating waste solutions, providing total service from collection to refining and reuse.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

EEJA manufactures and sells precious metal electroplating chemicals (gold, silver, palladium, platinum, rhodium, iridium, ruthenium, copper, nickel, indium) in both cyanide and non-cyanide formulations for semiconductors, electronic components, connectors, lead frames and decorative applications. Through its subsidiary EEJA Technologies Ltd., it also designs and builds wafer, connector, and lead frame plating equipment. The company additionally offers a complete precious metal recycling service from waste recovery through refining and reuse.

Product overview

EEJA is a precious metal surface treatment company offering an integrated portfolio of plating chemicals and plating equipment. The chemical portfolio includes gold (PRECIOUSFAB Au, MICROFAB Au, IM MEISTER, CERAGOLD, AC FAB series), silver (N-BRITE, PRECIOUSFAB Ag, MetSil series), and platinum group metals (Pd, Pt, Rh, Ir, Ru plating solutions). Supporting chemicals include pre/post treatment agents (EETOREX, HAKUREX series) and the innovative SEADCAT direct patternable plating technology. The equipment portfolio (manufactured by EEJA Technologies) includes the POSFER series fully automatic wafer plating equipment, Cluster Type Plating Equipment, semi-automatic CUP-PLATER and Stir CUP-PLATER systems, RAD-Plater experimental equipment, connector partial plating equipment, and lead frame plating equipment. The company also provides precious metal recycling services and publishes a comprehensive digital catalog. All products serve semiconductor, electronic components, connectors, lead frames, and decorative industries.

Differentiator

Problem solved

Functional benefit

Brands

• EEJAテクノロジーズ (EEJA Technologies): Subsidiary specializing in design, manufacturing, and sales of plating equipment including wafer plating, connector plating, lead frame plating, and electrolytic etching equipment.

Quantifiable outcome

• ISO9001, ISO14001, ISO45001 certified for plating chemical design, development and manufacturing

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators5 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Uyemura & Co. Uyemura is a Japanese precious-metal plating chemical maker headquartered in Osaka with direct overlap to EEJA's gold, silver and PGM plating lines. It serves the same Japanese semiconductor, connector, and decorative customers and is the closest head-to-head domestic competitor to EEJA.
• Technic Inc. Technic is a U.S.-headquartered specialty supplier of precious-metal plating chemistries (gold, silver, palladium, platinum, rhodium) and plating equipment. It directly mirrors EEJA's chemicals + equipment model and serves electronics, semiconductor packaging, and decorative plating end markets globally.
• Daiwa Fine Chemicals (JCU Corporation): JCU Corporation (formerly Daiwa Fine Chemicals) is a Japanese specialist in plating chemicals and surface-finishing equipment for electronics, automotive and decorative applications. It competes directly with EEJA in cyanide/non-cyanide formulations, plating additives, and plating equipment for connector and IC-substrate customers.

Emerging players

• Metalor Technologies International SA: Metalor is a sister company under the Tanaka Holdings umbrella, acquired by Tanaka Kikinzoku Kogyo in 2016, and produces precious-metal chemicals and plating salts. It shares EEJA's parent and competes/overlaps in the global precious-metal plating chemistry market across Europe, the Americas, and Asia.

Broad incumbents

• Atotech (Element Solutions): Atotech is the largest global supplier of plating chemicals and equipment across electronics and general metal finishing, now part of Element Solutions. EEJA competes most directly with Atotech's electronics plating portfolio in semiconductor packaging and connector plating, but Atotech has a much broader geographic and end-market footprint.
• MacDermid Enthone (Element Solutions): MacDermid Enthone is a global specialty chemicals supplier of plating chemistries for electronics and industrial finishing, also part of Element Solutions after the Atotech merger. It competes with EEJA in precious-metal and copper plating for semiconductor packaging, PCBs, and connectors, with broader geographic coverage than EEJA.
• Heraeus Precious Metals: Heraeus is a major precious-metals group supplying PGM chemicals, plating salts and recycling services to electronics customers globally. Comparable to EEJA on the precious-metal chemistry and recycling side, but operates at a much larger scale and across multiple precious-metal value chains beyond plating.
• Mitsubishi Materials (Electronic Materials & Chemicals): Mitsubishi Materials supplies plating chemicals, sputtering targets, and bonding materials to Japanese semiconductor and connector customers. It overlaps with EEJA's plating chemistry portfolio serving the same Japan-centric fab and component supplier base.
• Resonac (formerly Showa Denko) Electronics Materials: Resonac supplies a broad portfolio of electronic materials including plating chemistries, CMP slurries, and packaging materials to semiconductor customers. It overlaps with EEJA in plating chemicals for advanced packaging and competes for similar OSAT and IDM qualifications in Asia.
• DuPont Electronics & Industrial: DuPont supplies metallization chemistries for advanced semiconductor packaging, including electroless and electrolytic plating used in wafer bumping and RDL. It competes with EEJA for fab qualifications at advanced nodes and serves many of the same leading OSAT and IDM customers, but as part of a much larger electronics materials portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Electroplating Engineers ofJapan