Shinosaki played for Keio University.
He also played for Keio BRB was consisted of his alma mater Keio University players and graduates.
He won 1939 and 1940 Emperor's Cup at the club with Yukio Tsuda, Hirokazu Ninomiya and Takashi Kasahara.
On June 16, 1940, when Shinosaki was a Keio University student, he debuted for Japan national team against Philippines and Japan won the match.
This biographical article related to a Japanese association football forward is a stub.