Tokyo Ohka Kogyo → SK hynix
Yes, wafergraph tracks Tokyo Ohka Kogyo as a supplier of SK hynix, as of 2026-10-09. SK hynix sources from 170 tracked suppliers in this dataset; Tokyo Ohka Kogyo is positioned as a leader in Materials, so this edge is harder to replace than a challenger or niche supplier.
Data as of 2026-10-09 · relationship type: tracked supplier → customer · both names resolve in companies.json · no dollar amount is shown unless it already sits on a company record, and none is invented here
Why this edge matters
Tokyo Ohka Kogyo (leader in Materials) is a tracked supplier of SK hynix (leader in Memory). Photoresist specialist with leading EUV resist share. HBM leader supplying NVIDIA; top-two in DRAM, owns Solidigm NAND. The edge is one of 170 tracked suppliers of SK hynix and one of 8 tracked customers of Tokyo Ohka Kogyo.
Source: derived from both company records and the counted edges.
Concentration / risk note
Tokyo Ohka Kogyo is positioned as a leader in Materials, so this edge is harder to replace than a challenger or niche supplier.
Basis: supplier position. Omitted on edges where the graph does not back a concentration claim.
The two companies
Tokyo Ohka Kogyo (supplier)
Photoresist specialist with leading EUV resist share.
SK hynix (customer)
HBM leader supplying NVIDIA; top-two in DRAM, owns Solidigm NAND.
Other tracked suppliers of SK hynix
Other tracked customers of Tokyo Ohka Kogyo
Frequently asked questions3
- Is Tokyo Ohka Kogyo a supplier of SK hynix?
- Yes. wafergraph records Tokyo Ohka Kogyo as a tracked supplier of SK hynix (as of 2026-10-09).
- How many suppliers does SK hynix have?
- The dataset records 170 tracked suppliers for SK hynix.
- How many customers does Tokyo Ohka Kogyo have?
- The dataset records 8 tracked customers for Tokyo Ohka Kogyo.
Cite as: wafergraph, “Tokyo Ohka Kogyo → SK hynix — supplier relationship in the semiconductor supply chain”, https://wafergraph.com/relationship/tok/sk_hynix/ (data as of 2026-10-09).
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