Real name: Ryo Koriyama
Born on February 24, 1974 in Hitoyoshi City, Kumamoto Prefecture. Lives in Tokyo. March 1992: Kumamoto Prefectural Taragi High School general education class. Joined Musashi Seimitsu Kogyo Co., Ltd. in April 1992. In October 2011, he became the general secretary of the Musashi Precision Labor Union. Became exclusive to the labor union. In October 2015, he was appointed as the executive committee member of the Musashi Precision Labor Union. Served as a director of the United Aichi Safety and Health Center and a member of the Aichi Regional Specific Minimum Wage Council (general machinery) worker committee. In October 2019, retired from the position of Musashi Precision Labor Union executive committee member. Retired from Musashi Seimitsu Kogyo Co., Ltd. in September 2022. Joined JAM, an industrial union, in November 2022 and is affiliated with the Headquarters/Politics Center. Candidate for the 27th regular election for the House of Councilors in 2025 and won the election