Akiko Oishi, the joint representative of the Reiwa Shinsengumi party and a former member of the House of Representatives, has failed to secure a seat in Osaka's 5th district. Despite her efforts in campaigning and running for both the district and proportional representation, she could not achieve a revival position either. This election marked her third attempt in the same district after previously benefitting from proportional representation in earlier elections.

The campaign came in the wake of the resignation of party leader Taro Yamamoto, who stepped down from his Senate position due to health reasons. Oishi and her fellow candidates stepped up to carry out representative duties and travel nationwide for campaigning. Their platform emphasized the abolition of the consumption tax and other reforms to gain support in their region amid significant political changes.

Oishi is notable not just for her political ambitions but also for her previous role as a public servant in Osaka Prefecture, where she gained media attention for challenging the local government over unpaid overtime. This incident brought her into the spotlight, but despite her efforts in the latest election cycle, she was unable to connect with voters to secure a victory in a historically competitive race.