Katana is built and run by an individual investor in Japan.
It started with rising long-term interest rates. Musashi (ticker 7521), an election-equipment wholesaler, holds a large cash position, yet its earnings sag in years without an election. I wondered whether higher rates — and the interest income that comes with them — would cushion those troughs. Other companies had to share that structure, so I went looking. What I could not find was a screener that let me express my own angle: something like "a high cash ratio combined with meaningful sensitivity to interest income." So I built Katana.
While researching, I noticed that existing screeners only filter by the metrics they provide; checking whether each company fits your own thesis still meant reading annual reports one company at a time. Katana aims to change that: describe the companies you want, and it combines its own metrics with AI judgments of annual reports to find them across the whole Japanese market.
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