Japan and the United Kingdom are computed
Your years are now worked out under Japanese and British law too. Japan: miscellaneous income at the tax year's average price, your 申告書第一表 filled in, and the file e-Tax imports. United Kingdom: sales matched the same day, then in the 30 days after it, then against your Section 104 pool, and the computation HMRC asks you to enclose with your return; relief for a loss on derivatives is yours to claim. There is no machine-readable file for the United Kingdom yet. Pick your country in the header and everything is computed again.