Geesink took up judo aged 14 and by 17 started competing internationally, winning a silver medal in 1951. The following year, he won his first European title. Through to 1967, twenty more European titles followed. At the 1956 World Championships, Geesink was eliminated in the semi-finals against Yoshihiko Yoshimatsu. At the 1961 World Championships, Geesink, then 5th dan, became World Champion in the open class, defeating the Japanese champion Koji Sone. Japanese judokas had won all the World Championship titles contested up to that point. Judo debuted as an official sport at the 1964 Summer Olympics, which were held in the sport's home country, Japan. Although Japan dominated three of the four weight divisions, Anton Geesink won the final of the open weight division, defeating Akio Kaminaga in front of his home crowd. After winning the 1965 World Championships and a last European title in 1967, Geesink quit competitive judo. Anton Geesink was one of the few 10th Dan grade judoka recognized by the IJF but not by Kodokan at that rank. Promotions from 6th to 10th Dan are awarded for services to the sport of judo. In 2010 there are three living 10th dan grade judoka recognized by Kodokan: Toshiro Daigo, Ichiro Abe and Yoshimi Osawa. The Kodokan has not awarded the 10th Dan to anybody outside Japan.
Geesink made his acting debut in 1962, playing a detective in the Dutch film Rififi in Amsterdam. In 1965 he starred as Samson in the Italian historical film , and in the 1970s-1980s took part in two Dutch TV series. In the 1960s he published several books on judo in Dutch and English.
In 1987, Geesink became a member of the board of the Dutch National Olympic Committee, and a member of the InternationalOlympic Committee. Geesink was among the IOC members suspected of accepting bribes during the scandal surrounding the election of Salt Lake City as the host of the 2002 Winter Olympics. Geesink's name was cleared by the IOC which nevertheless issued him a warning for the appearance of a conflict of interest which could have damaged the reputation of the IOC. Geesink continued working for IOC until his death in 2010.
Geesink was born and raised in Utrecht. His family was poor and he started work as a builder aged 12. He died in 2010 aged 76 in the town of his birth. He was survived by Jans Geesink, his wife of more than 50 years; his daughters Willy and Leni; and son Anton jr..
Honours
Geesink was chosen as the Dutch Sportsman of the Year in 1957, 1961, 1964 and 1965. He was awarded the Order of the Sacred Treasure by the Japanese government in 1997. His home town of Utrecht has a street named after him — which is the street he lived on for some time up until his death in August 2010. On 29 January 2000, he was awarded an honorary doctorate by Kokushikan University, a Japanese university known for its sport education and of which four alumni are Olympic gold medalists in judo, with the following praise:
At the 1964 Tokyo Olympics, Mr. Geesink won the gold medal in the open class as the first non-Japanese. Since then, with the spirit of budō, he has contributed to the international peace and promoted the cultural exchange and friendship between the people of the Netherlands and of Japan. Furthermore, he explored judo in light of education and somatology and has been devoted to its diffusion and development. To honor his contribution to the worldwide diffusion of judo, this university, as a body which prizes the spirit of budō, awarded him an honorary doctorate of Kokushikan University.
