About this app
This app contains information on approximately 6,000 islands in Japan. Island attribute information includes the island's name, kana name, English name, location, area, coast length, population, whether it's populated, island grouping name, applicable act, designated area name, basis for territorial sea only, basis for EEZ (Exclusive Economic Zone), populated remote territorial island (RTI) area, specific populated RTI area, name of populated RTI area, included nature park, natural monument, access, and notes. If you are interested in learning about islands in Japan, this app would be very useful. ■ Approved by GSI This map is a reproduction of the Digital Map 25000 (Geographical Names & Public Facilities) published by the Geospatial Information Authority of Japan (Approval Number JO-FUKU No.604 2014) ■ Exemption from Liability ASTI will not be held liable for anything that transpires as a result of using this app. No liability whatever will be accepted for any damage, injury or loss that may be suffered as a result of using the app.
Latest release
What’s New
- Fixed bugs.
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 16, 2026 · 11:22 AM $3.99