Key Facts
• July 21, 2025: Results of the 27th Senate election confirmed.
• Liberal Democratic Party (LDP) secured 304,233 votes (24.05%) in Ibaraki, down by 120,000 votes.
• Sanseitō achieved 179,563 votes (14.20%), a 5.5-fold increase from the previous election.
• Democratic Party for the People (DPP) gained 172,723 votes (13.65%), 2.5 times higher than before.
• Constitutional Democratic Party (CDP) received 163,835 votes (12.95%), recovering from prior losses.
• Komeito garnered 125,805 votes (9.95%), a decrease of 20,000 votes.
• Japan Innovation Party (Ishin) dropped significantly, losing over 83,000 votes, securing 62,574 votes (4.95%).
• Communist Party (JCP) and Social Democratic Party (SDP) both fell below 5% vote share.
• Sanseitō leveraged social media to attract young and unaffiliated voters, securing 17,000 votes in Mito City.
• LDP maintained top position in all municipalities, including 28,000 votes in Mito City (23.2%).
Summary
The 27th Senate election results in Ibaraki Prefecture revealed significant shifts in voter preferences. The Liberal Democratic Party (LDP) retained its top position with 304,233 votes but suffered a loss of over 120,000 votes compared to 2022. Sanseitō emerged as a major contender, increasing its vote count by 5.5 times to 179,563, driven by effective use of social media to engage younger and unaffiliated voters. The Democratic Party for the People (DPP) and Constitutional Democratic Party (CDP) also saw notable gains, with the DPP doubling its votes to 172,723 and the CDP recovering to 163,835 votes. Meanwhile, Komeito and the Japan Innovation Party (Ishin) experienced significant declines, with Ishin losing over 83,000 votes. Despite these changes, the LDP maintained its dominance across all municipalities, including key areas like Mito City and Tsukuba City. The election highlighted the growing influence of emerging parties like Sanseitō and the shifting dynamics within Japan’s political landscape.
