At the World Aquatics Championships in Fukuoka, Japan, Australian Ian Thorpe became the first swimmer to win six gold medals at a single FINA world championship.

The 2001 World Aquatics Championships or the 9th FINA World Swimming Championships were held in Fukuoka, Japan between 16 July and 29 July 2001.

Fukuoka is the sixth-largest city in Japan and the capital city of Fukuoka Prefecture, Japan. The city is built along the shores of Hakata Bay, and has been a center of international commerce since ancient times. The area has long been considered the gateway to the country, as it is the nearest point among Japan's main islands to the Asian mainland. Although humans occupied the area since the Jomon period, some of the earliest settlers of the Yayoi period arrived in the Fukuoka area. The city rose to prominence during the Yamato period. Because of the cross-cultural exposure, and the relatively great distance from the social and political centers of Kyoto, Osaka, and later, Edo (Tokyo), Fukuoka gained a distinctive local culture and dialect that has persisted to the present.

Ian James Thorpe is an Australian retired swimmer who specialised in freestyle, but also competed in backstroke and the individual medley. He has won five Olympic gold medals, the second most won by any Australian after fellow swimmer Emma McKeon. With three gold and two silver medals, Thorpe was the most successful athlete at the 2000 Summer Olympics, held in his hometown of Sydney.

The World Aquatics Championships, formerly the FINA World Championships, are the World Championships for six aquatic disciplines: swimming, diving, high diving, open water swimming, artistic swimming, and water polo. The championships are staged by World Aquatics, formerly known as FINA, the international federation recognised by the International Olympic Committee (IOC) for administering international competitions in water sports. The championships are World Aquatics' largest and main event traditionally held biennially every odd year, with all six of the aquatic disciplines contested every championships. Dr. Hal Henning, FINA's president from 1972 through 1976, and their first American President, was highly instrumental in starting the first World Aquatics Championships, and in retaining the number of swimming events in the Olympics, which gave an advantage to nations with larger, more balanced swim teams.