Keiji Suzuki

is a Japanese judoka and sports scientist.

Suzuki won the Olympic gold medal in the heavyweight (+100 kg) division in 2004. He is also a two-time world champion.

Suzuki is noted for being a remarkably small judoka in the heavyweight division; he also regularly competed in the light-heavyweight (100 kg) class.

Suzuki is known as having some of the best Ashi-waza of all heavyweights.

Suzuki was eliminated in the first round of the +100 kg event at the 2010 World Championships in Yoyogi, Japan, via ippon by Janusz Wojnarowicz of Poland.

Suzuki dislocated his shoulder in the semi-finals of the 2012 All-Japan Judo Championships and subsequently announced his retirement as he was not selected to represent Japan at the London 2012 Olympic Games.

Suzuki was appointed Men's Heavyweight Coach for the Japanese team by the new head coach, his friend and former rival Kosei Inoue.

He replaced Inoue as head coach of the national team in 2021.