Semiconductor & AI supply-chain companies in Japan

Largest Japan companies by market cap

All 81 companies by segment

Materials (40)

• Ajinomoto — Supplies effectively all ABF build-up film, the insulator in advanced CPU/GPU substrates. monopoly · $31.6B
• Shin-Etsu Chemical — World's largest silicon wafer maker and a major photoresist supplier. leader · $67.2B
• HOYA — Dominant maker of EUV photomask blanks and substrates. leader · $51.7B
• Ibiden — Leading IC package substrate maker; key supplier for Intel and AI packages. leader · $36.8B
• JX Advanced Metals — World leader in sputtering targets for chip metallization; listed in 2025. leader · $20.7B
• Tokyo Ohka Kogyo — Photoresist specialist with leading EUV resist share. leader · $6.4B
• Mitsui Chemicals, Inc. — First commercial EUV pellicle manufacturer (ASML license); developing CNT pellicles for High-NA EUV. leader · $5.2B
• Fujimi Incorporated — Specialist leader in CMP slurries and polishing materials. leader · $1.6B
• Mitsui High-tec — Leading leadframe maker and precision stamping specialist. leader · $1.1B
• Stella Chemifa — World's leading maker of high-purity hydrofluoric acid for semiconductors. leader · $410M
• JSR — Top photoresist maker incl. EUV resists; taken private by JIC in 2024. leader
• Daikin Industries — Fluorochemicals maker supplying etch gases and coatings alongside HVAC. major · $36.5B
• Kyocera — Ceramic packages, substrates, and electronic components. major · $28.6B
• FUJIFILM — Electronic materials arm supplies resists, CMP slurries and chemicals. major · $25.4B
• Resonac — Formed from Showa Denko and Hitachi Chemical; broad back-end materials line. major · $18.9B
• Sumitomo Metal Mining — Materials maker supplying bonding wire, plating, and target metals. major · $17.3B
• Nippon Sanso Holdings — Japanese industrial gas group with strong electronics gas share in Asia. major · $15.2B
• Nitto Denko Corporation — Japanese materials group; supplies semiconductor wafer dicing tape and back-grinding tape. major · $14.6B
• Toray Industries — Japanese materials group; supplies PHOTONEECE photosensitive polyimide used for passivation and dielectric layers in semiconductor packaging. major · $11.6B
• Mitsubishi Chemical Group — Diversified chemicals; electronic materials, polishing slurries, and films. major · $10.8B
• TOPPAN Holdings — Major merchant photomask maker within diversified printing group. major · $9.1B
• Dai Nippon Printing — Top-tier photomask producer alongside its printing businesses. major · $8.4B
• AGC Inc. — Glass and chemicals maker; leading EUV photomask blanks and fluorinated gases. major · $7.6B
• SUMCO — Second-largest silicon wafer producer, supplying all leading fabs. major · $7.2B
• Nissan Chemical — Specialty chemicals maker; anti-reflective and spin-on materials for fabs. major · $6.8B
• Sumitomo Chemical — Diversified chemicals group with significant photoresist business. major · $6.3B
• Tosoh — Supplies sputtering targets and quartzware for fabs. major · $5.2B
• Mitsubishi Gas Chemical — Cleaning chemicals and BT substrate resin maker. major · $4.8B
• Mitsubishi Materials — Advanced materials; bonding wire, cemented carbide, and low-alpha solder/plating chemicals (exited sputtering targets, complete March 2024). major · $4.4B
• Iwatani — Industrial and electronic specialty-gas supplier. major · $3.1B
• Nippon Electric Glass — Japanese glass maker; supplies through-glass-via (TGV) glass core substrates for advanced chip packaging and image sensor cover glass. major · $2.2B
• Tokuyama — Japanese chemical maker; semiconductor-grade polysilicon and fumed silica. major · $1.8B
• Ohara Inc. — Japanese optical and electronic glass maker; supplies low-expansion glass-ceramics and quartz glass for semiconductor exposure equipment and photomask substrates. major · $250M
• Shinko Electric Industries — Package substrate and leadframe maker; taken private by JIC and delisted from TSE in June 2025. major
• Tanaka Precious Metals — Precious-metals group supplying bonding wire, plating, and targets. major
• Sumitomo Bakelite — Semiconductor encapsulation resins and packaging materials. niche · $4.0B
• Ferrotec — Supplies vacuum feedthroughs, ceramics and materials to equipment makers. niche · $3.1B
• Nagase & Co. — Chemicals trading house and electronic-materials maker. niche · $3.0B
• Adeka — Chemicals maker supplying high-k/ALD precursors and additives. niche · $2.8B
• Kanto Denka Kogyo — Specialty fluorine gas and etchant chemical maker. niche · $790M

Equipment (Front End) (14)

• Lasertec — Only supplier of actinic EUV photomask inspection systems. monopoly · $19.0B
• Tokyo Electron — Japan's biggest fab equipment maker; near-monopoly in coater/developers. leader · $155.1B
• SCREEN Holdings — Leader in wafer cleaning equipment and coater/developer systems. leader · $15.8B
• Daifuku — Dominant supplier of automated material handling (OHT) inside fabs. leader · $13.5B
• Ebara — CMP systems maker and leading dry vacuum pump supplier. major · $12.9B
• Kokusai Electric — Specialist in batch thermal deposition furnaces for memory and logic. major · $12.4B
• Horiba — Mass-flow controllers and analytical instruments for fabs. major · $6.1B
• ULVAC — Vacuum equipment maker; sputtering and deposition systems for semis. major · $2.3B
• Ushio — Industrial light source maker for lithography and inspection. major · $1.9B
• Hitachi High-Tech — Hitachi subsidiary strong in conductor etch and CD-SEM metrology. major
• Canon — Supplies KrF/i-line lithography and is commercializing nanoimprint litho. challenger · $24.9B
• Nikon — DUV lithography maker; distant second to ASML in scanners. challenger · $4.0B
• Sumitomo Heavy Industries — Industrial group making ion implanters and precision equipment. niche · $4.4B
• JEOL — Electron-beam lithography and e-beam metrology instruments. niche · $2.1B

Analog, Power, RF (10)

• Murata Manufacturing — World leader in RF filters, modules and MLCC components. leader · $83.8B
• TDK — Electronic components maker; SAW filters, MLCCs, and MEMS sensors. leader · $35.3B
• Nichicon — One of the world's top makers of aluminum electrolytic and conductive-polymer capacitors. leader · $1.1B
• Nippon Chemi-Con — One of the world's top makers of aluminum electrolytic capacitors and capacitor materials (electrode foils). leader · $480M
• Mitsubishi Electric — Power module heavyweight in industrial, rail and SiC. major · $68.8B
• Asahi Kasei Microdevices (AKM) — Audio codec, converter, and magnetic sensor IC maker (AKM). major · $13.8B
• Fuji Electric — Major IGBT and power module maker for industry and rail. major · $12.3B
• Taiyo Yuden — Leading maker of MLCCs and inductors. major · $7.5B
• Sanken Electric — Japanese power semiconductor and power IC maker. major · $870M
• Rubycon Corporation — Privately held Japanese maker of electrolytic and film capacitors and switching power-supply units. niche

Equipment (Back End) (4)

• Advantest — Test leader; its testers qualify nearly every AI accelerator and HBM stack. leader · $153.0B
• DISCO — Controls most of the market for wafer dicing and grinding equipment. leader · $37.8B
• TOWA — Leader in semiconductor molding/encapsulation equipment. leader · $1.1B
• Tokyo Seimitsu (Accretech) — Wafer dicing, grinding, and metrology equipment maker. major · $4.4B

IDM (4)

• Sony Semiconductor Solutions — Dominant CMOS image sensor maker for smartphones and cameras. leader · $145.3B
• Renesas Electronics — Japanese MCU and analog IDM focused on automotive and industrial. major · $38.6B
• ROHM — Japanese power and analog IDM; early mover in SiC devices. major · $12.0B
• Toshiba — Power semiconductor and storage group; taken private by JIP in 2023. major

Distribution & Misc (4)

• Hamamatsu Photonics — Leading maker of photonic devices, sensors, and light sources. leader · $4.3B
• Sumitomo Electric Industries — Optical fiber, compound-semiconductor devices, and EV power modules. major · $42.6B
• Furukawa Electric — Optical fiber, components, and electronic materials maker. major · $17.3B
• Macnica Holdings — Japan's largest semiconductor distributor. major · $4.0B

Design (Fabless) (2)

• Socionext — Japanese custom SoC design house for auto and data center customers. major · $2.2B
• MegaChips — Japanese ASIC and system-LSI designer. niche · $940M

AI & Data Center (1)

• NTT — Japanese telecom giant; NTT Global Data Centers is a top-five operator. major · $89.5B

Memory (1)

• Kioxia Holdings — NAND inventor (ex-Toshiba Memory); operates JV fabs with SanDisk. major

Foundry (1)

• Rapidus — Government-backed Japanese foundry targeting 2nm production in 2027. challenger

Single-source chokepoints in Japan

• Ajinomoto — monopoly in Substrates
• Lasertec — monopoly in Metrology & Inspection

Tracked revenue

74 of the 81 companies report revenue in the dataset, totalling $559.5B (latest fiscal year per company, SEC EDGAR or Wikidata).