After graduating from Tokyo University of Education, he joined his local club Toyo Industries (later Mazda) in 1963.

In December 1966, Imanishi was selected for the Japan national team prior to the 1966 Asian Games.

[1] After retirement, Imanishi became a manager for Mazda as Teruo Nimura's successor in 1984.

In 1987, he resigned as manager and was succeeded by Hans Ooft.

This biographical article related to a Japanese association football defender born in the 1940s is a stub.