According to the Japan Times news agency, Japan's self-government party chairman, CaoÊÐÔçÃç, was elected Japanese prime minister in the 21st House of Representatives nomination election. She became the first female prime minister in Japan's history. It is that this is the first time that the spouse of the Japanese prime minister appears to be a man, and Japan's first "Mr. First" became the husband of CaoÊÐÔçÃç.

According to the report, Yamamoto is 73 years old, and is nine years older than Yamamoto, 64. Yamamoto was a member of the House of Representatives of the self-government party, the two married in September 2004, but divorced in 2017 because of "discrepancies in political ideas", but Yamamoto was fully supported by him when Yamamoto ran for president of the People's Party in 2021. Yamamoto was elected a member of the House of Representatives in the same year. The two married again in December 2021.

The report also stated that Takumi Yamamoto ran for the House of Representatives again in October 2024 but failed to be elected. He suffered from cerebral infarction in early 2025 with sequelae.