Quickly convert between Japanese era names and Christian era years. Features include era and year searching, period and era pickers, and the ability to display the current year in either system. Texts can be shown in Japanese or English.
3.0.1
July 4, 2026
Minor bugs have been fixed.
Gengou Lib provides a quick reference for the Japanese era system, allowing you to search for eras and years, pick specific periods, and convert between Japanese and Christian era years. It can also display the current year in either system.
Yes, the texts within Gengou Lib can be displayed in either Japanese or English, independently of your device's default language setting. This makes it accessible for users who prefer English.
Gengou Lib is available for iPhone, iPad, and iPod touch devices. It is designed to function across these Apple platforms.
The latest version of Gengou Lib is 3.0.0, and it was last updated on August 26, 2025. This indicates a recent update, suggesting ongoing support and potential improvements.
Gengou Lib has an age rating of 4+. This means it is considered suitable for children aged 4 and above, with no mature content.
Yes, Gengou Lib is available for free. There are no costs associated with downloading or using its core features.
Gengou Lib has a rating of 2.5 stars from 2 ratings. This suggests a mixed to negative user reception based on the limited feedback available.
The application notes that two Gengou schemes were used in parallel from 1331 to 1392 during the Nanboku-chō period. This indicates an awareness of historical complexities within the Japanese era system.
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