class of 1947	election year	class of 1950
#1 (1947: #1, 6-year term)		#1 (1947: #2, 3-year term)
Hajime Miyoshi (Co-op)	1947[1]	Tsunetarō Katō (JLP)
	1950[2]	Takashi Morisaki (JSP)
Kazuo Shirakawa (Indep.)	1953[3]
	1956[4]	Tarō Hirai (LDP)
Keikichi Masuhara (LDP)	1957 by-el.[5]
Juichi Tsushima (LDP)	1959[6]
	1962[7]
Tan Maekawa (JSP)	1965[8]
	1968[9]
	1971[10]
	1974 by-el.[11]	Takushi Hirai (LDP)
	1974[12]
Kenji Manabe (LDP)	1977[13]
	1980[14]
	1983[15]
	1986[16]
Jun Kioka (JSP)	1989[17]
	1992[18]
Kenji Manabe (LDP)	1995[19]
	1998[20]	Toshio Yamauchi (LDP)
	2001[21]
	2004[22]
Emiko Uematsu (DPJ)	2007[23]
	2010[24]	Yoshihiko Isozaki (LDP)