Constitutional Litigation

Case challenging the constitutionality of electoral vote weight disparity under Article 14 of the Japanese Constitution.

1. 2023 (Gyo-Ko) No. 237 Appeal Case Seeking Revocation of the Unconstitutional Reduction of Public Assistance Standards, and Appeal Case Seeking Revocation of Public Assistance Change Decision

2. Jurisdiction: Japan (2025)
3. Original Case: 令和5(行コ)237 各生活保護基準引下げ違憲処分取消等請求控訴事件、生活保護変更決定取消請求控訴事件
4. DefendantsGovernment of Japan (Minister of Health, Labour and Welfare)PlaintiffsMultiple public assistance recipients including representative plaintiff Endo MikioJudgesPresiding Judge of Tokyo High CourtInstitutionsTokyo High Court
5. Case Tags: Constitutional Litigation;Administrative Appeal;Social Welfare Law;Right to Survival

1. Immediate Appeal Case Regarding the Dismissal of a Provisional Injunction Petition for the Construction of the Saga Airport Self-Defense Forces Garrison

2. Jurisdiction: Japan (2025)
3. Original Case: 令和6(ラ)171 佐賀空港自衛隊駐屯地建設工事差止仮処分命令申立却下決定に対する即時抗告事件
4. VictimsNoneDefendantsNonePlaintiffsNoneInvestigatorsNoneProsecutorsNoneDefense AttorneysNonePlaintiff AttorneysNoneJudgesNoneInstitutionsSaga District CourtFukuoka High CourtMinistry of Defense of JapanResidents' Group Opposing the JSDF Garrison at Saga Airport
5. Case Tags: Japan-Korea Case;Japan Self-Defense Forces;Provisional Injunction;Constitutional Litigation

1. 令和7(行ケ)2 人口比例選挙請求事件

2. Jurisdiction: Japan (2025-10-26)
3. DefendantsCentral Election Management CouncilPlaintiffsHiroyuki UewakiKaoru InoueJudgesYukihiko ImaizakiInstitutionsSupreme Court of JapanTokyo High CourtCentral Election Management Council
4. Case Tags: Constitutional Litigation;Vote Value Disparity;Supreme Court of Japan;Electoral Reform

1. Reiwa 7 (Gyo-Ke) 1 Population Proportional Election Litigation

2. Jurisdiction: Japan (2025-02-10)
3. Original Case: 令和7(行ケ)1 人口比例選挙請求事件
4. DefendantsElection Administration CommissionPlaintiffsKozo YamamotoHiroshi OkadaPlaintiff AttorneysMasashi YoritomiTeam of Constitutional ScholarsJudgesPresiding Judge Akira OjimaInstitutionsTokyo High CourtHouse of Representatives
5. Case Tags: Constitutional Litigation;Election Law;Judicial Review;Vote-Value Disparity