House of Councillors Election

Case arising from Japan's 2025 upper house election

1. Reiwa 7 (Gyo-Ke) No. 9 Election Invalidation Case

2. Jurisdiction: Japan (July 28, 2025)
3. Original Case: 令和7(行ケ)9 選挙無効請求事件
4. DefendantsState of JapanPlaintiffsHidetoshi MasunagaPlaintiff AttorneysHidetoshi MasunagaJudgesPresiding Judge of Tokyo High CourtInstitutionsTokyo High Court
5. Case Tags: Election Invalidation Lawsuit;Vote Weight Disparity;House of Councillors Election;Constitutional Litigation