Mainichi Shinbunsha Kyouryoku - Saikyou no Kanji Drill 5-man Mon / release r2g8sk98 / correction
Suggest a correction 毎日新聞社協力 最強の漢字ドリル5万問, Nintendo DS, JP
Corrections are GitHub issues on the public data repository, so each one is in the open with its evidence. This page fills the issue in; on GitHub you say what kind of evidence it is and submit (a GitHub account is needed). How corrections are checked.