Overview

• Sanseito won 14 upper house seats in July’s election, exceeding the 10-seat threshold to draft nonspending bills and depriving Prime Minister Ishiba’s coalition of its majority.
• Despite the setback, Prime Minister Shigeru Ishiba has vowed to remain in office to maintain stability and carry forward his government’s policies.
• Led by Sohei Kamiya, the party leveraged a subscription-funded digital strategy and early conspiracy-driven appeals to rapidly build its membership.
• Sanseito’s platform advocates resisting globalization with tighter immigration measures and proposes constitutional revisions to grant the emperor limited veto powers.
• The party is now targeting the next lower house election by late 2028 and plans to push its agenda on defense, immigration and imperial authority.