What does Tokyo Ohka Kogyo make?

Tokyo Ohka Kogyo makes EUV/ArF/KrF resists.

Who are Tokyo Ohka Kogyo's customers?

Tokyo Ohka Kogyo's tracked customers include TSMC, Samsung Electronics, SK hynix, Intel, Micron Technology, United Microelectronics (UMC), GlobalFoundries, SMIC.

Where is Tokyo Ohka Kogyo headquartered?

Tokyo Ohka Kogyo is based in Kawasaki.

What part of the semiconductor supply chain is Tokyo Ohka Kogyo in?

Tokyo Ohka Kogyo operates in the Photoresists & Chemicals segment, where it is a market leader.

Tokyo Ohka Kogyo

Tokyo Ohka Kogyo is a leader in the Materials segment of the semiconductor & AI supply chain, headquartered in Kawasaki. Its key customers include TSMC, Samsung Electronics, SK hynix.

Photoresist specialist with leading EUV resist share.

Ticker: TSE: 4186
Headquarters: Kawasaki
Founded: 1940
Revenue: $1.5B (FY2025) · +17.9% YoY
Net income: $209M
Operating margin: 8.3%
Market position: leader
Value-chain segment: Photoresists & Chemicals
Key products: EUV/ArF/KrF resists

About Tokyo Ohka Kogyo

Tokyo Ohka Kogyo, headquartered in Japan, operates in the Photoresists & Chemicals segment of the semiconductor & AI supply chain and is positioned as a market leader there. Its key products include EUV/ArF/KrF resists. wafergraph maps 8 tracked customers for Tokyo Ohka Kogyo across the value chain. It has a supply-chain criticality score of 83/100, with 242 companies downstream of it.

Role in the chain

Tokyo Ohka Kogyo is a market leader in Materials (Photoresists & Chemicals), headquartered in Japan. Photoresist specialist with leading EUV resist share.

Diligence questions

The dataset names 8 tracked customers for Tokyo Ohka Kogyo. How concentrated is demand among those names, and which of them have a documented second source in this graph?
Tokyo Ohka Kogyo is positioned as a leader in Materials. How replaceable is this vendor on the process step you are buying?
Tokyo Ohka Kogyo is headquartered in Japan. What jurisdiction, export-control or logistics risk sits at that HQ, versus at the fabs or plants the filings actually name?
Tokyo Ohka Kogyo trades as TSE:4186. What does the latest reported period say about capacity and backlog versus the graph position above?
Before treating any edge as a verified relationship, check the provenance labels on the company page and the method note at /methodology.

Full diligence pack for Tokyo Ohka Kogyo