トップ ／ ガイド
GUIDES
ガイド
日本の法人データやインボイス制度を扱う開発者・経理担当者向けの解説です。
Japan's Corporate Number vs. Invoice Registration (T) NumberGUIDE
What each number proves, why having a corporate number does not mean a company is invoice-registered, and how to check.
How to verify a Japanese supplier's invoice registrationGUIDE
What to collect, where to look it up, and the pitfalls — a practical verification procedure for overseas buyers.
Japanese business days: weekends, national holidays, and substitute holidays準備中
振替休日など、日本の営業日計算で間違えやすいルール（準備中）。