Japanese Supreme Court

Grand Bench decision of the highest court in Japan on legislative apportionment and electoral fairness.

1. 2025 House of Representatives Election Invalidation Case

2. Jurisdiction: Japan (October 2025)
3. Original Case: 令和7(行ケ)1 選挙無効請求事件
4. DefendantsTokyo Metropolitan Election Administration CommissionOsaka Prefecture Election Administration CommissionState of JapanPlaintiffsTaro YamadaHanako SuzukiIchiro SatoPlaintiff AttorneysHidetoshi MasunagaJudgesYukihiko ImasakiMichiharu HayashiToru SakaiInstitutionsSupreme Court of JapanTokyo High CourtTokyo Metropolitan Election Administration Commission
5. Case Tags: Election Invalidation;Vote Value Disparity;Unconstitutionality;Japanese Supreme Court