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This site provides online and offline tools for the conversion of Japanese dates into their Western equivalents. The calculation is based on tables from Tsuchihashi and Zöllner. A short introduction to the pre-modern calendar system in Japan can be found here (text in German).

The online version of NengoCalc is based on a technology commonly known as AJAX.Your Browser needs to support Javascript and the XMLHttp Request Object in order to render this page.

NengoCalc v4 beta



Year   Romaji 

Japanese date:
Western date:
8.2.601 (Wednesday)
Cyclic Signs:
乙酉、辛酉 (Day, Year)