Only the current version so far — new entries appear as the app ships updates.
山の電波地図アップローダー is a travel & local app by KMI Software with 1,000+ downloads (about 1.8K estimated). +1 installs in the last 7 days. Released Nov 2, 2014. Install growth, rank history, SDKs and ad networks.
From the store listing: “To mobile phone radio wave information sharing site of "mountain of radio map", it is the app for you to upload the measurement data”