Shunsuke Kasaya (笠谷 俊介, Kasaya Shunsuke, born March 17, 1997 in Ōita, Ōita Prefecture) is a Japanese Professional baseball pitcher for the Yokohama DeNA BayStars of Nippon Professional Baseball.

Kasaya participated in the 2rd grade summer 95th Japanese High School Baseball Championship as an ace pitcher at the Ōita Prefectural Ōita Commercial High School with Hikaru Kawase and Masato Morishita.

On July 17, 2020, Kasaya pitched in relief against the Orix Buffaloes and became his first Winning pitcher.

In 2023 season, Kasaya developed inflammation in his left elbow in May and spent a month in rehabilitation.

This biographical article relating to a Japanese baseball pitcher is a stub.