How to File a Kakuteishinkoku for FX Income in Japan: 2026 Guide
This article contains affiliate links. If you trade foreign exchange (FX) in Japan, you have likely encountered the word kakuteishinkoku (確定申告) — Japan’s annual income tax return. Filing it correctly for FX income is not as straightforward as it sounds. FX profits are taxed under a special category, reported on a separate schedule, and subject to a flat rate that differs from ordinary income tax. Miss a step or use the wrong form, and you risk penalties, overpaying, or losing the right to carry forward losses. ...