お城マップ - 全国の城めぐり・登城記録 is a travel & local app by slowlab with 500+ downloads (about 664 estimated). +44 installs in the last 7 days. Released Jun 27, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Explore castles across Japan, including the 100 Famous Castles of Japan, using a map and record your visits. Enjoy your castle collection through completion rates and photos.”