Convert Japanese eras and Western years

Enter a date or an era year to see the Western year, Japanese era, zodiac, age and world calendars.

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零隱私外洩
不用於 AI 訓練
永久免費
Eco: no server processing: Processing happens only on your device. No data-center power or cooling water is used.

🤲你的檔案屬於你，就留在你的手中。

選項

Direction Western → Japanese era Japanese era → Western

Date

Age table (from 1920)

Dates before Meiji 6 (1873) used the lunar calendar and may differ.

How are years with an era change shown?

Date conversion switches eras on the exact day. The age table uses the era at the end of each year.

How are world calendars calculated?

With the calendar support built into your browser (Intl). Wording may differ slightly by browser.

用 Japanese Era Converter 處理我的檔案安全嗎？

安全。檔案絕不會上傳，只在你的瀏覽器內處理。每個頁面都套用了封鎖對外連線的政策（Content-Security-Policy connect-src 'none'），左下角的計數器也會顯示已傳送資料：0 位元組。

免費嗎？需要帳號嗎？

完全免費，不需要帳號，也沒有使用次數限制。

手機也能用嗎？

可以。iPhone 和 Android 的手機瀏覽器都能使用。檔案很大時，用電腦會比較快。