Gengou Lib is made and published by Masayuki Akamatsu. AppBrain is an independent app data site and isn't affiliated with Masayuki Akamatsu. The app name, icon, screenshots and description belong to Masayuki Akamatsu and are shown as published on the App Store.

About Gengou Lib

Gengou Lib is a productivity app developed by Masayuki Akamatsu.

User Ratings

Gengou Lib is rated 2.50 out of 5 stars. The rating is based on 2 ratings.

App Information

Gengou Lib is freely available from the App Store. The app size is 6.28 MB. The latest version available is 3.0.1. The last update was on July 4, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since February 2019.

Description by Masayuki Akamatsu (from the App Store)

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

- Era and Year Search
- 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.

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More data about Gengou Lib

Price	Free
Rating	2.50 based on 2 ratings
Ranking	Not ranked
Version	3.0.1
App size	6.28 MB
Suitable for	Everyone

Screenshots

Screenshots by Masayuki Akamatsu, from the the App Store listing

Official page on the App Store

Alternatives to Gengou Lib

Changelog of Gengou Lib

No changelog data

Developer information for Masayuki Akamatsu

Masayuki Akamatsu

Address:

Comments on Gengou Lib for iOS

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App Store Rankings for Gengou Lib

This app is not ranked

Technologies used by Gengou Lib

Frequently asked questions about Gengou Lib

Is Gengou Lib free?

Yes. Gengou Lib is free on the App Store.

Is Gengou Lib still available?

Yes. Gengou Lib is on the App Store, and the last update we saw was on July 4, 2026.

How large is Gengou Lib?

Gengou Lib is 6.28 MB.

Is Gengou Lib suitable for children?

App Store rates the content of Gengou Lib as suitable for everyone.

How do people rate Gengou Lib?

Gengou Lib scores 2.50 out of 5 stars, from 2 ratings on the App Store.

Who made Gengou Lib?

Gengou Lib was developed by Masayuki Akamatsu. It is listed in the productivity category on the App Store.

What are the best alternatives to Gengou Lib?

People looking at Gengou Lib also look at these productivity apps: Japanese Calendar Converter, Japanese Era Converter (JEras), 年号早見メモ帳, 和暦変換, Text Recognition - OCR Scanner.

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