Jōji Yamamoto (山本 譲司, Yamamoto Jōji; born 20 September 1962) is a Japanese politician, journalist and care worker who is the leader of the anti-establishment political party Reiwa Shinsengumi. He is a member of the House of Representatives and a former member of the Tokyo Metropolitan Assembly.
As a social activist, he serves as a director of the rehabilitation and protection corporation "Doho-kai," a steering committee member of the "Life Reconstruction Counseling Center" of the Prisoner Support Organization, and a director of the Tokyo Rehabilitation and Protection Employment Support Providers Organization.
After his election in the 2026 general election, he was appointed secretary general of Reiwa Shinsengumi. On 31 July 2026, Yamamoto was elected leader of Reiwa Shinsengumi following the resignation of Taro Yamamoto (no relation).