Free Japanese Calculators & Converters

Instantly convert era dates, calculate taxes, and more. 100% free, browser-based, bilingual EN/日本語.

Date & Calendar Tools

Convert Reiwa, Heisei, Showa dates to Western calendar and back.

令和7年は西暦2025年です。Quick answer with reference table.

Calculate 満年齢 (man-nenrei) and 数え年 (kazoedoshi).

Calculate Japan's 10% and 8% consumption tax instantly.