Tokyo Ohka Kogyo

As of 2026-10-09, Tokyo Ohka Kogyo has 0 tracked suppliers and 8 tracked customers in this dataset. The customer list here follows a shared pattern for this segment rather than being individually confirmed for Tokyo Ohka Kogyo — see /methodology.

Sourced from 1 reference — primary source — last verified 2026-06-12.

Photoresist specialist with leading EUV resist share.

Ticker: TSE: 4186
Headquarters: Kawasaki
Founded: 1940
Revenue: $1.5B (FY2025) · +17.9% YoY
Net income: $211M
Operating margin: 19.0%
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