A native of Ishikawa Prefecture, Kamiwazumi competed in sixteen Grand Slam tennis events between 1972 and 1976.

In doubles, he reached the round of 16 at the 1971 French Open, partnering compatriot Toshiro Sakai.

Kamiwazumi's biggest grand prix result was reaching the semi-finals in Hilversum in 1971, where despite going up two sets he lost the match to Ross Case.

Kamiwazumi is tied for the most years played on the Japanese Davis Cup team, 12, a record he shares with Gouichi Motomura.

[citation needed] He posted 12 wins against 8 losses in singles and went 8 and 8 in doubles, in a total of 20 ties played in.