[1] Yaegashi was born in Daejeon, Japan on March 24, 1933, but raised in Hanamaki.

After graduating from Waseda University, he joined Furukawa Electric in 1958.

In June 1956, when Yaegashi was a Waseda University student, he was selected Japan national team for 1956 Summer Olympics qualification.

At 1968 Olympics, he played as a captain in first match against Nigeria, he was replaced for injury in the 78minuts.

[5] In 1967, Yaegashi succeeded Ryuzo Hiraki as player-manager for Furukawa Electric.