The most durable way to own the AI buildout is to own its basic material inputs: the upstream consumables every downstream technology needs no matter which architecture wins. Toyo Tanso makes the ultra-high-purity isostatic graphite consumables inside semiconductor crystal-growth furnaces, and its IG-110 grade is one of a very small number of nuclear-qualified graphites going into the high-temperature reactors being built to power AI data centers.
Independent Research · July 2026 · TSE: 5310
A four-page note on a Japanese small-cap that sells the isostatic graphite consumables inside semiconductor crystal-growth furnaces and the nuclear-qualified IG-110 graphite going into reactors being built to power AI data centers. It walks through the business, the numbers, the nuclear qualification moat, the ways I could be wrong, and what would change my mind.
Read the full memo (PDF)
This came out of my broader AI supply chain work. I did not find the name in a screener. It surfaced from mapping the compound-semiconductor layer of my AI Supply Chain Globe and scoring the upstream companies on whether the product is genuinely hard to replace, actually moves revenue, and is underfollowed relative to how critical it is.
This is independent research I produced for my own learning. It is not investment advice, I hold no position, and I am not a licensed financial advisor.