Seiichiro Shimizu (清水 清一朗, Shimizu Seiichirō, born April 23, 1947) is a Japanese politician of the Liberal Democratic Party, a member of the House of Representatives in the Diet (national legislature). A native of Higashimurayama, Tokyo and graduate of Nihon University, he had served in the assembly of Tokyo since 1993. He was elected to the House of Representatives for the first time in 2005 after an unsuccessful run in 2003.