# Who does Tokyo Ohka Kogyo (TOK) pay? Who are its key suppliers?
Canonical: https://valuechain.wiki/tokyo-ohka · Facet: suppliers · Updated: 2026-07-12T06:17:26.508+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: Tokyo Ohka Kogyo (TOK) discloses no named confirmed suppliers/cost counterparties; 2 relationships are tracked as undisclosed/aggregate. Per the valuechain.wiki graph: 2 cost edges, backed by 1 dated sources, 0 of them primary filings (as of 2026-07-12).

### 설비·인프라 (비공개) (low)
- note: Production equipment and infrastructure investment — leading-edge resist capacity expansion underpins share defense (suppliers undisclosed).
- [confirms] TOK (EN, ir, published 2025-05-01) https://www.tok.co.jp/eng/ir: "Production equipment and infrastructure (undisclosed)."

### 부품·소재·R&D (비공개) (low)
- note: Parts, materials and R&D for resist manufacturing — purity and photosensitivity are the source of competitiveness, making materials sourcing and research the barrier to entry (undisclosed).
- [confirms] TOK (EN, ir, published 2025-05-01) https://www.tok.co.jp/eng/ir: "Parts, materials and R&D (undisclosed)."

Reverse side: https://valuechain.wiki/tokyo-ohka/customers.md · Ripple: https://valuechain.wiki/tokyo-ohka/ripple.md

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Full node: https://valuechain.wiki/tokyo-ohka.md · JSON: https://valuechain.wiki/tokyo-ohka.json