Results for Japan in 100 metres Butterfly, Men

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1968 Summer Olympics	Satoshi Maruya	5
	Yasuo Takada	13
1972 Summer Olympics	Yasuhiro Komazaki	24
1976 Summer Olympics	Hideaki Hara	7
	Shinsuke Kayama	32
1984 Summer Olympics	Taihei Saka	22
	Shudo Kawawa	24
1988 Summer Olympics	Hiroshi Miura	14
	Yukinori Tanaka	24
1992 Summer Olympics	Keiichi Kawanaka	=20
	Tomohiro Miyoshi	34
1996 Summer Olympics	Takashi Yamamoto	13
	Yukihiro Matsushita	20
2000 Summer Olympics	Takashi Yamamoto	=5
2004 Summer Olympics	Takashi Yamamoto	9
2008 Summer Olympics	Takuro Fujii	6
	Masayuki Kishida	26
2012 Summer Olympics	Takeshi Matsuda	17
	Takuro Fujii	21
2016 Summer Olympics	Takuro Fujii	20
2020 Summer Olympics	Naoki Mizunuma	10
	Takeshi Kawamoto	20
2024 Summer Olympics	Naoki Mizunuma	8
	Katsuhiro Matsumoto	15