About this app
This app lets you compare Japanese eras and Western years in a simple list. You can display a variety of information, including Western years, Japanese eras, zodiac signs, and the Imperial year system. Important dates can be saved to your favorites, giving you quick access whenever you need them. Displayed items and date ranges can be freely customized, making it useful for research, hobbies, and learning Japanese history.
Latest release
What’s New
* Fixed an issue where Japanese era and Western year conversions were off by one year. * Limited the supported date range to 1873 onward, starting from Meiji 6. * Updated the app icon.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 21, 2026 · 11:16 AM Free
Screenshots
