Japan Address & Calendar Tools
Free, fast tools for Japanese postal codes, English addresses, the Japanese calendar and school years — based on official data from Japan Post and the Cabinet Office. Works on your phone; nothing you enter is sent anywhere.
- Japanese postal code lookup124,523 codes, romaji & English address format
- Japanese era converterReiwa, Heisei, Showa ⇔ Western years
- Japanese holidays 2026 & 2027English names, substitute holidays, long weekends
- Age & Japanese school yearGrade, kazoedoshi, entry/graduation years
- Your name in Japanese katakana1,394 common names, hiragana & half-width
Japanese version with more tools (rokuyo calendar, business days, yakudoshi…): こよみと数字の便利帳.