# Japanese Semiconductor Supply Chain Entities

> Photoresists | Silicon Wafers | HF & Fluorine | CVD/ALD Precursors | Sputtering Targets | CMP | IC Substrates | Equipment | Process Tapes | Other | Infrastructure | Verification Log

Japan reportedly has the deepest semiconductor materials ecosystem. The entries
below are leads to investigate, not a confirmed ranking.

Every entry below is a lead to investigate, not a fact to cite. Your job is to verify,
contradict, or discover what's missing. Share figures are training-data estimates (~2023-2024),
not measurements. Look for companies and relationships that aren't listed here.

## Photoresists & Lithography
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| JSR | JSR株式会社 | DELISTED (JIC privatized ~2024) | ArF/EUV resists | Major |
| TOK | 東京応化工業 | 4186.T | ArF/EUV resists + coating equipment | Major |
| Shin-Etsu Chemical | 信越化学工業 | 4063.T | Resists + photomask blanks (suspected dominant) + wafers | Significant |
| Sumitomo Chemical | 住友化学 | 4005.T | Resists | Top 5 |
| Fujifilm | 富士フイルム | 4901.T | Resists + CMP slurry | Growing |
| **Toyo Gosei** | 東洋合成工業 | 4970.T | **Photoacid generators (PAGs), suspected dominant (verify)** | Suspected dominant, investigate |
| Osaka Organic Chemical | 大阪有機化学工業 | 4187.T | Resist polymer monomers | Tier-2 key |

## Silicon Wafers
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| Shin-Etsu Handotai (SEH) | 信越半導体 | Parent: 4063.T | Believed top global wafer maker (verify) | Believed top global, major |
| SUMCO | SUMCO | 3436.T | Among top global wafer makers (verify) | Among top global, major |
| RS Technologies | RSテクノロジーズ | 3445.T | Believed top reclaimed wafer maker | Major (reclaim) |

## High-Purity HF & Fluorine Chemistry
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| **Stella Chemifa** | ステラ ケミファ | 4109.T | Ultra-pure HF, believed top globally (verified 2026-03-13) | Suspected dominant, investigate |
| **Morita Chemical** | 森田化学工業 | **PRIVATE** | Ultra-pure HF, among top globally | Intelligence gap (private company) |
| Central Glass | セントラル硝子 | 4044.T | Fluorine gases (C4F8, NF3) | |
| Kanto Denka Kogyo | 関東電化工業 | 4047.T | NF3, WF6 | |
| Daikin | ダイキン工業 | 6367.T | Fluoropolymers, HF | Huge company |

## CVD/ALD Precursors
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| **ADEKA** | ADEKA | 4401.T | ALD precursors (Hf, Zr, Ru), significant to major position (verify) | Investigate position |
| Tri Chemical Labs | トリケミカル研究所 | 4369.T | CVD/ALD precursors (pure-play) | |

## Sputtering Targets
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| **JX Advanced Metals** | JXアドバンストメタルズ (旧JX金属) | 5016.T (TSE Prime, IPO March 2025; ENEOS retains ~49.9%) | Cu, Ta, Ti targets, believed top global (Cu targets, verify); rolled copper foil, suspected dominant to near-monopoly (verify) | Suspected dominant, investigate |
| Mitsubishi Materials | 三菱マテリアル | 5711.T | Cu, Al, Ti targets | |
| Tosoh | 東ソー | 4042.T | ITO targets, quartz | |

## CMP Materials
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| Fujimi | フジミインコーポレーテッド | 5384.T | CMP slurry (among top global suppliers) | |
| **Fuso Chemical** | 扶桑化学工業 | 4368.T | Colloidal silica for CMP slurry | Suspected dominant (tier-2), investigate |
| AGC | AGC (旧旭硝子) | 5201.T | Ceria CMP slurry + EUV pellicles | |

## IC Substrates & Advanced Packaging
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| Ibiden | イビデン | 4062.T | FC-BGA substrates (among top global suppliers) | Intel key customer |
| Shinko Electric | 新光電気工業 | DELISTED (6967.T delisted June 2025) | FC-BGA substrates | Resonac subsidiary |
| **Ajinomoto Fine-Techno** | 味の素ファインテクノ | Parent: 2802.T | **ABF film, suspected near-monopoly (verify)** | Suspected near-monopoly, investigate |
| Sumitomo Bakelite | 住友ベークライト | 4203.T | EMC (epoxy molding compound), believed leading | |
| Resonac | レゾナック | 4004.T | EMC, CMP, SiC, gases, die attach | Multi-segment |

## Equipment & Inspection (selected — major monopolies)
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| **Lasertec** | レーザーテック | 6920.T | EUV mask inspection, reported suspected near-monopoly (verify) | Suspected near-monopoly, investigate |
| **DISCO** | ディスコ | 6146.T | Dicing saws, suspected dominant (verify) | Suspected dominant, investigate |
| **SCREEN** | SCREENホールディングス | 7735.T | Wafer cleaning, suspected dominant | |
| **HORIBA** | 堀場製作所 | 6856.T | Mass flow controllers, suspected dominant | |
| Kokusai Electric | KOKUSAI ELECTRIC | 6525.T | Batch CVD/ALD furnaces | |
| Ebara | 荏原製作所 | 6361.T | CMP equipment, vacuum pumps | |
| Hitachi High-Tech | 日立ハイテク | Absorbed into 6501.T | CD-SEM, suspected dominant (verify) | |

## Process Tapes & Films
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| Nitto Denko | 日東電工 | 6988.T | Dicing/backgrinding tape, suspected dominant (verify) | |
| Lintec | リンテック | 7966.T | Dicing/backgrinding tape, among top suppliers | |

## Other Critical Materials
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| Mitsubishi Gas Chemical | 三菱ガス化学 | 4182.T | E-grade H2O2, major position (verify), BT resin believed top | |
| Tokuyama | トクヤマ | 4043.T | Semiconductor polysilicon, IPA | |
| Denka | デンカ | 4061.T | Spherical silica filler for EMC, major position (verify) | |
| Mitsui Mining & Smelting | 三井金属鉱業 | 5706.T | Ultra-thin copper foil, believed top (substrates) | |
| Mitsui High-tec | 三井ハイテック | 6966.T | Lead frames, believed top global | |
| Tanaka Precious Metals | 田中貴金属 | PRIVATE | Bonding wire, precious metal targets | |
| Senju Metal | 千住金属工業 | PRIVATE | Solder balls/paste (among top global suppliers) | |
| Taiyo Holdings | 太陽ホールディングス | 4626.T | Solder resist ink, suspected dominant (verify) | |

## Infrastructure
| Company | Japanese | Ticker | Products | Notes |
|---|---|---|---|---|
| Kurita Water | 栗田工業 | 6370.T | Ultra-pure water systems, believed top | |
| Daifuku | ダイフク | 6383.T | AMHS (fab automation), believed leading | |
| Rorze | ローツェ | 6323.T | Wafer handling robots | |
| Ferrotec | フェローテック | 6890.T | Quartz crucibles, major position (verify) | Japan+China ops |
| Nippon Pillar Packing | 日本ピラー工業 | 6490.T | Fluoropolymer fluid handling | |
| NGK Insulators | 日本ガイシ | 5333.T | Electrostatic chucks, suspected dominant (verify) | |

## Verification Log

Entries start as unverified hypotheses from training knowledge. When an investigation confirms or updates a claim, log it here. Unlogged entries remain unverified.

| Company | Claim Verified | Date | Sources | Investigation |
|---|---|---|---|---|
| JX Advanced Metals | IPO'd March 19, 2025 on TSE Prime as 5016.T; Japan's largest IPO since SoftBank 2018; ~64% global Cu sputtering target share; ~78% rolled copper foil; ENEOS retains ~49.9% | 2026-03-14 | Bloomberg, Japan Times, Nikkei, Yahoo Finance | Time-sensitive claims verification |
| Stella Chemifa | #1 globally in ultra-pure HF, ~70% global share; Korea largest overseas market (58% overseas ratio) | 2026-03-13 | Kabutan | HF supplier ID |
| Stella Chemifa | Post-2019 reduced to indirect Samsung supply via ENF Technology | 2026-03-13 | JRI, Korean press | HF supplier ID |
| Morita Chemical | ~1/3 Korean HF market pre-2019; exports halted Jul 2019, resumed Jan 2020; net profit fell 90% | 2026-03-13 | Nikkei, MyNavi | HF supplier ID |
| JSR | 2022 TSMC Excellent Performance Award for litho materials (2nd consecutive year) | 2026-03-13 | JSR Micro press release | TSMC-JSR patent/trade |
| JSR | Acquired Inpria for $514M (2021) for EUV metal oxide resist; TSMC Partners invested in Inpria Series C | 2026-03-13 | BusinessWire | TSMC-JSR patent/trade |
| JSR | Delisted June 25, 2024 — JIC privatization for $6.4B | 2026-03-13 | Digitimes, multiple | TSMC-JSR patent/trade |
| JSR | Zero co-filed patents with TSMC found (extensive search) — relationship is customer-supplier, not co-development | 2026-03-13 | Google Patents, Espacenet, Justia | TSMC-JSR patent/trade |