He won the bronze medal with the Japan national team at the 1968 Summer Olympics in Mexico City, finishing as the tournament's top scorer with seven goals,[3] and is the all-time leading goalscorer for Japan.

For four years in a row, he was the top scorer in the Kanto university league.

After graduating, Kamamoto joined the Japan Soccer League club Yanmar Diesel in 1967 (currently known as Cerezo Osaka).

Yanmar Diesel won their 1st title, the 1968 Emperor's Cup, with Kamamoto's winning goal in the final.

[citation needed] Kamamoto played at the Football at the 1966 Asian Games.

He retired from the national team in 1977, having played in 76 matches and having scored 75 goals.

[6] Kamamoto, however, has been recognized with 80 goals in 84 appearances from the Japan Football Association,[1] and previously as well by FIFA,[7][8] but he isn't mentioned with this tally in their latest publications.

In 1991, he signed as manager with rivals Matsushita Electric (to be later known as Gamba Osaka).