About
Decode Tokyo. Then invest.
Japan Stock Dojo is English-first intelligence on Japan's under-covered small & mid caps — the companies that file in Japanese and never make the English wire.
The gap we close
Thousands of listed Japanese companies disclose constantly — earnings, revisions, large-shareholder filings — almost entirely in Japanese. English coverage thins out fast below the megacaps. We read the primary disclosures (not the news cycle) and turn them into clear English: an AI brief for each filing, 5% large-shareholder flow, and a machine-learning Dojo Score.
Independent by design
- No ads, no sponsors. Nothing on the page is paid placement.
- We don't sell your data. Your watchlist and account are yours.
- Everyone sees the same thing. The Dojo Score, the rankings and the briefs are identical for every reader — no per-user "recommendations," no individualised advice. It's research and education, not a tip service.
- Funded by subscriptions and optional reader support. No ads, no sponsors, no paid placement.
Honest methodology
We hold ourselves to a strict, point-in-time research discipline: a factor at any date uses only data that was public by then (no lookahead), and the model's headline results come from a sealed hold-out that was tested exactly once. We also publish what didn't work — the features and variants we tried and dropped — because a research service that only shows its wins isn't being honest. The full write-up lives on the Methodology page; any performance figure we cite is the v1 sealed-hold-out number, nothing newer.
Building in public
We'll be candid about the constraints, too. The most-asked question is "where are the price charts?" The honest answer: redistributing Japanese price and index data requires licensing we haven't cleared yet, so we show our own derived analysis instead of raw market data or charts. We'd rather ship a smaller, license-clean product than quietly cross a line. More on that in the FAQ.
Who made this
Japan Stock Dojo is built by Tomoaki, a data scientist and individual investor based in Japan. Across nine years investing through U.S. and Japanese equities, FX, Bitcoin and gold, the same gap kept showing up: strong, under-covered Japanese small-caps that overseas investors simply can't reach — locked inside Japanese-language filings.
So I built the bridge. A systematic, point-in-time model reads those filings and turns them into a transparent Dojo Score and plain-English briefs. Every member sees the same scores — no personalization, no stock tips, no ads.
This is independent research, not investment advice.
Come build with us
The product is rolling out now. Join the launch list, or say hello.