On June 27, 1979, when Tashima was a University of Tsukuba student, he debuted for Japan national team against Malaysia.

As he returned, he was a technical coach for the football club of his alma mater, and taught for several years at Rikkyo University.

In 2001, he coached the Japan U-17 national team, to which he led for the first time since 1995 in the first round of the 2001 U-17 World Championship.

In April 2016, he also became president of East Asian Football Federation and served until March 2018.

This biographical article related to a Japanese association football midfielder born in the 1950s is a stub.