The Rikken Democratic Party of Japan has suffered a significant setback in the House of Councillors election, admitting to what could be interpreted as a de facto defeat. The largely influential opposition party is now facing mounting challenges to its strategies and public image, as it tries to regain popularity in the wake of such an electoral setback.

Rikken (Constitutional Democratic Party) being a major opposition party, this defeat is a significant political event in Japan. Elections like these often serve as a barometer of public opinion, potentially influencing future policy-making. As Japanese society highly values consensus, this defeat may reflect a divergence between the party's policies and public sentiment.

In the US and EU, such a defeat for an influential party would also be crucial. The aftermath usually involves significant soul-searching, policy reassessment, and leadership shake-ups within the party. This situation parallels the Democratic Party's loss in the US 2016 Presidential Election, or the UK Labour Party's defeat in the 2019 General Election.