"Gengou" is a quick reference of the Japanese era system. This application has functions as below.

- Period picker
- Era picker
- Christian era year picker
- Japanese era year picker
- Show this year button
- Texts can be shown in Japanese or English independently of the default language setting.
- Application badge can show this year number in the Japanese era or the Christian era.

The Japanese era system identifies a year by the combination of the era name (Gengou or Nengou) and the year number within the era. For example, A.D. 2001 is Heisei 13. Please note that two Gengou schemes were used in Parallel from 1331 to 1392 during Nanboku-chō period.

This application would be very useful if you are working with the governments, municipal offices and/or certain companies in Japan.

What’s New

Version 2.1.0

Supports the new era "令和 (Reiwa)"
Source: "初春令月氣淑風和" from Man'yōshū
Reference: "仲春令月時和気清" from Wen Xuan

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

Ryan Han ,

Excellent excellent!!!

Fantastic application with a great interface and funtions. I no longer need to search on the web and use my fingers to figure out the Japense Year system! Must buy this if you know about Japan.

App Privacy

The developer, Masayuki Akamatsu, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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