Only the current version so far — new entries appear as the app ships updates.
Moko is an education app by hyoromo with 50,000+ downloads (about 65K estimated). Rated 4.2 from 1.3K ratings. Released Jul 2, 2011. Install growth, rank history, SDKs and ad networks.
From the store listing: “Learn Japanese Greetings app "Moko".”