In 1948, he set world records in the 400 and 1,500 meter freestyles at the Japan national championships.

[1][2] Because of his achievement at the 1949 U.S. National Championships of Aquatics, in which he set new world records of freestyle swimming in all distance categories, Furuhashi was referred to by the US media as "the flying fish of Fujiyama".

[3] Furuhashi competed in the 1952 Summer Olympics, but did not perform well because of the lingering effects of dysentery which he had contracted during a swimming tour of South America in 1950.

In total, Furuhashi set 33 world records during his swimming career.

[1] On August 2, 2009, he was found dead in his sleep at his hotel room in Rome, where he was staying for the 2009 World Aquatics Championships.