Taro Yamamoto, leader of the Reiwa Shinsengumi party, announced his resignation as party representative and his retirement from politics on Sept. 9, 2026 [1].
Yamamoto's departure marks a significant shift for the party, as he was its central figure and primary strategist. His exit coincides with a planned change to the party's name for the first time in seven years [1].
The decision follows a series of personal and legal challenges. Yamamoto revealed he had been diagnosed as being one step away from multiple myeloma, a type of bone marrow cancer [1], [2]. He said, "I, Taro Yamamoto, will resign as the representative of Reiwa Shinsengumi" [1].
Adding to these health concerns, Yamamoto faced legal penalties following a speeding violation on a highway in Oita City [1]. Reports indicate he was driving at 149 km/h [1] in a zone with a speed limit of 69 km/h [1].
As a result of the violation, Yamamoto was ordered to pay a fine of 90,000 yen [1]. His driver's license was also suspended for 90 days [1].
Regarding his future, Yamamoto indicated a desire to prioritize his recovery. He said, "Among various options, I have decided to resign for now. After that, I aim to fully recover my health and return" [1].
While some reports from the time of his announcement indicated a full exit from the political sphere [1], other accounts noted he resigned his seat in the House of Councillors without explicitly confirming a permanent retirement from all political activity [2].
“"I, Taro Yamamoto, will resign as the representative of Reiwa Shinsengumi."”
The resignation of Taro Yamamoto creates a leadership vacuum in Reiwa Shinsengumi, a party largely built around his public persona and populist appeal. By linking his departure to both a serious health diagnosis and a high-profile legal infraction, Yamamoto has framed his exit as a necessity for personal recovery. The simultaneous decision to rename the party suggests an attempt to decouple the organization's identity from its founder to ensure its survival after his departure.
