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Numio

Japanese Era Converter — Wareki (Reiwa, Heisei, Showa) to Western Year

Convert western years and dates to Japanese era dates (Reiwa, Heisei, Showa, Taisho, Meiji) and back. Handles the year an era changed, gannen (year 1) and abbreviations like R8 and H31.

Mode

Input

Result

Type or paste on the left — the result updates as you type.

Full dates are supported from 1873-01-01 (when Japan adopted the Gregorian calendar); years from 1868. Input such as 令和8年, R8, H31/4/30 or 2019-05-01 is recognised.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Format references

Tool page updated: