Judo at the 1984 Summer Olympics

The Judo competition at the 1984 Summer Olympics continued the seven weight classes first used at the 1980 Games. With the open division, there were eight competitions. Powerhouse Japan returned to the top of the medal count after eight years, having boycotted the Moscow games. Because of the Soviet-led boycott of the Los Angeles games, several traditionally strong judo countries, including Cuba and the Soviet Union, did not participate. The Judo competition was held at California State University, Los Angeles.

Austrian Peter Seisenbacher in the 86 kg class won the gold medal, as did Hitoshi Saito of Japan in the over 95 kg class, feats they would repeat in 1988, becoming the first judoka to win gold at two Olympics.

In the open division, four-time world champion Yasuhiro Yamashita tore a right calf muscle in the preliminary match against Arthur Schnabel. This put Yamashita at a huge disadvantage since he executed his throws by pivoting on his right leg. Though he managed to win the match with an Okuri-Eri-Jime, the injury caused him to visibly limp during the semi-final match against Laurent Del Colombo. Yamashita was thrown with an Osoto Gari only 30 seconds into the match, but managed to return an Osoto Gari and won the match with a Yoko-Shiho-Gatame (side four-quarter hold). He played the final match against Mohamed Ali Rashwan of Egypt. Yamashita won the final and the gold medal despite his injury. The match witnessed a remarkable fair play act from Rashwan who did not aim for Yamashita's right leg. Rashwan was even given an award from the International Fairplay Committee.

Popular pro wrestler/judoka Chris Adams appeared as an advisor to the UK Judo squad, where his brother Neil Adams won a silver medal in the 78 kg class. It was the third and final Olympics the Adams brothers were involved in, competitor or otherwise.