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The first cornerstone guide is published: who has to file FinCEN Form 114, which Japanese accounts count, how to read a 通帳 for the year's peak balance, the Treasury year-end rate, spouse and family rules, and what to do if you're years behind. Verified against eleven primary sources, June 2026.
Read the revised guide: FBAR for US Persons in Japan →First version of the site: the guide framework (every guide will cite primary sources and carry a last-verified date), the tools index, and this updates feed. The first batch of money guides — FBAR, US taxes from Japan, nenkin and Social Security, and more — is drafting now.
The flagship planning tool's hosted demo (v1.0.2) now lives at /tools/taigan-bridge/. It opens pre-loaded with a sample household so you can explore all sixteen modules without entering anything. For your real data, use the download link in the demo banner and open the single HTML file locally — your records stay on your own machine.