Results for Japan in 100 metres Breaststroke, Women

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1968 Summer Olympics	Kiyoe Nakagawa	6
	Yukari Takemoto	17
1972 Summer Olympics	Yoko Yamamoto	24
1976 Summer Olympics	Toshiko Haruoka	18
	Kazuyo Inaba	23
	Chiharu Mori	DNS
1984 Summer Olympics	Hiroko Nagasaki	6
	Kaori Iwasaki	22
1988 Summer Olympics	Yoshie Nishioka	25
	Hiroko Nagasaki	34
1992 Summer Olympics	Kyoko Iwasaki	13
	Kyoko Kasuya	17
1996 Summer Olympics	Masami Tanaka	13
	Kyoko Iwasaki	22
2000 Summer Olympics	Masami Tanaka	6
	Junko Isoda	DNS
2004 Summer Olympics	Masami Tanaka	9
2008 Summer Olympics	Asami Kitagawa	8
	Megumi Taneda	17
2012 Summer Olympics	Satomi Suzuki	3	Bronze
	Mina Matsushima	16
2016 Summer Olympics	Satomi Suzuki	12
	Kanako Watanabe	15
2020 Summer Olympics	Kanako Watanabe	17
	Reona Aoki	19
2024 Summer Olympics	Satomi Suzuki	12
	Reona Aoki	19