🏛️ Politics · Next Week

LDP/Komeito loses its majority in Japan's House of Councillors (Upper House election, July 20, 2026)

Hit ✦ AI-generated prediction Published on 11. July 2026 · Predicted for 20. July 2026 · Based on: Speculative

Probability

68%

On July 20, 2026, Japanese voters elect the House of Councillors (Upper House). LDP/Komeito hold a slim upper-house coalition majority. CSIS analysis diagnoses 'prolonged instability' following the LDP's lower-house majority loss in October 2024. Despite PM Takaichi's landslide Lower House win in February 2026 (315/465 seats), headwinds remain: opposition parties (CDP, Nippon Ishin, Sanseito) exploit the ongoing LDP funds scandal (>50% of respondents cite it, Kyodo poll). No direct Polymarket/Kalshi market found; structural assessment: ~68%.

Data basis for this prediction

Wikipedia: Japanische Sangiin-Wahl am 20. Juli 2026 (Termin bestätigt)
CSIS: 'Japan's Upper House Election: Prolonged Instability' (Analyse Juli 2026)
Kyodo News / CSIS: >50 % der Befragten nennen LDP-Finanzskandal als Wahlmotiv (Juli 2026)
Bloomberg Graphics: Japan Takaichi Lower-House-Sieg Februar 2026 – 315 von 465 Sitzen

Verdict: Hit

[Vorzeitig entschieden] Koalition hält gesamt nur 122 der 248 Sitze (75 behaltene + 47 neu gewonnene) – verfehlt die absolute Mehrheit von 125. Historisch: erste Mehrheitsverlust in beiden Kammern seit LDP-Gründung 1955. Quelle: Nippon.com, East Asia Forum

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