Results for Japan in 100 metres Freestyle, Men

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1920 Summer Olympics	Masayoshi Uchida	5 h5 r1/4
	Kenkichi Saito	6 h3 r1/4
1924 Summer Olympics	Katsuo Takaishi	5
	Torahiko Miyahata	13
	Kazuo Onoda	15
1928 Summer Olympics	Katsuo Takaishi	3	Bronze
	Kazuo Noda	DNS
	Tokuhei Sada	DNS
1932 Summer Olympics	Yasuji Miyazaki	1	Gold
	Tatsugo Kawaishi	2	Silver
	Zenjiro Takahashi	5
1936 Summer Olympics	Masanori Yusa	2	Silver
	Shigeo Arai	3	Bronze
	Masaharu Taguchi	4
1952 Summer Olympics	Hiroshi Suzuki	2	Silver
	Toru Goto	4
	Yoshihiro Hamaguchi	9
1956 Summer Olympics	Atsushi Tani	7
	Hiroshi Suzuki	9
	Manabu Koga	=10
1960 Summer Olympics	Keigo Shimizu	11
	Katsuki Ishihara	=15
1964 Summer Olympics	Yukiaki Okabe	11
	Tadaharu Goto	14
	Tatsuo Fujimoto	=17
1968 Summer Olympics	Kunihiro Iwasaki	=21
	Masayuki Osawa	=33
1976 Summer Olympics	Kozo Higuchi	34
1984 Summer Olympics	Shigeo Ogata	33
	Satoshi Sumida	39
1988 Summer Olympics	Shigeo Ogata	32
1992 Summer Olympics	Tsutomu Nakano	34
	Shigeo Ogata	45
1996 Summer Olympics	Shunsuke Ito	37
2004 Summer Olympics	Yoshihiro Okumura	27
2008 Summer Olympics	Hisayoshi Sato	40
2016 Summer Olympics	Katsumi Nakamura	17
	Shinri Shioura	27
2020 Summer Olympics	Katsumi Nakamura	17