Only the current version so far — new entries appear as the app ships updates.
ホシオの理科クエスト 4年 is an education app by Fuji-Studio with 500+ downloads (about 596 estimated). Released Jun 16, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Complete all 11 units and 2000 questions of 4th-grade science with Hoshio, the light blue whale, on a quest. Completely free.”