Masakazu Sekiguchi (関口 昌一, Sekiguchi Masakazu; born June 4, 1953) is a Japanese politician of the Liberal Democratic Party who has served as the President of the Senate since 2024. Born in Saitama Prefecture, Sekiguchi was a dentist and a member of the Saitama Prefectural Assembly before his first election to the Senate in 2003. He served as parliamentary vice minister for Foreign Affairs, senior vice minister for Internal Affairs and Communications and chairman of the LDP caucus in the Senate, before he was elected Senate President in 2024.
Source: “Masakazu Sekiguchi”, English Wikipedia (CC BY-SA 4.0), excerpt