Supreme Court Grand Bench

Case decided by the Grand Bench of the Supreme Court of Japan

1. 2025 House of Representatives Election Invalidation Case (Population Disparity)

2. Jurisdiction: Japan (2025)
3. Original Case: 令和7(行ケ)2 人口比例選挙請求事件
4. DefendantsThe State of JapanPlaintiffsHiroshi KamiwakiJudgesYukihiko Imasaki (Chief Justice)InstitutionsSupreme Court of Japan, Grand Bench
5. Case Tags: Constitutional Litigation;Vote Value Disparity;Supreme Court Grand Bench;Reiwa Era Case