Results for Japan in 400 metres Hurdles, Men

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1928 Summer Olympics	Yoshio Miki	DNS
1932 Summer Olympics	Zhang Hsing-Hsien	4 h1 r1/3
1936 Summer Olympics	Tokio Fukuda	4 h1 r1/3
	Masao Ichihara	4 h3 r1/3
1952 Summer Olympics	Eitaro Okano	6 h4 r2/4
1956 Summer Olympics	Keiji Ogushi	3 h1 r1/3
1960 Summer Olympics	Keiji Ogushi	3 h3 r1/3
1964 Summer Olympics	Keiji Ogushi	5 h4 r1/3
	Eki Iijima	5 h5 r1/3
	Kiyoo Yui	7 h2 r1/3
1968 Summer Olympics	Kiyoo Yui	5 h1 r1/3
1984 Summer Olympics	Ryoichi Yoshida	7 h2 r2/3
	Shigenori Omori	5 h2 r1/3
1988 Summer Olympics	Ryoichi Yoshida	5 h2 r1/3
1992 Summer Olympics	Kazuhiko Yamazaki	4 h2 r1/3
	Yoshihiko Saito	4 h7 r1/3
1996 Summer Olympics	Kazuhiko Yamazaki	3 h1 r1/3
	Hideaki Kawamura	4 h4 r1/3
	Shunji Karube	5 h7 r1/3
2000 Summer Olympics	Hideaki Kawamura	4 h4 r1/3
	Kazuhiko Yamazaki	7 h2 r1/3
	Dai Tamesue	8 h8 r1/3
2004 Summer Olympics	Dai Tamesue	3 h2 r2/3
	Ken Yoshizawa	6 h1 r1/3
2008 Summer Olympics	Dai Tamesue	4 h4 r1/3
	Kenji Narisako	5 h1 r1/3
2012 Summer Olympics	Tetsuya Tateno	4 h6 r1/3
	Takayuki Kishimoto	DQ
	Akihiko Nakamura	DQ
2016 Summer Olympics	Keisuke Nozawa	6 h1 r2/3
	Yuki Matsushita	4 h1 r1/3
2020 Summer Olympics	Hiromu Yamauchi	6 h3 r2/3
	Kazuki Kurokawa	6 h4 r1/3
	Takatoshi Abe	6 h5 r1/3
2024 Summer Olympics	Daiki Ogawa	5h1 r2/4
	Kaito Tsutsue	DNSh2 r2/4
	Ken Toyoda	DNSh3 r2/4