This app is a temporeki clock. The temporeki is a temporal hour system that used mainly in the late Edo era (1844–1872).
The app is useful when you will read a Japanese historical document, adjust a Japanese clock, mimic samurai life, and so on. If you need more information, please check the developer's website.
■ Exemption from Liability
ASTI will not be held liable for anything that transpires as a result of using this information. No liability whatever will be accepted for any damage, injury or loss that may be suffered as a result of using the app.