Kōsuke Yamashita is a Japanese professional baseball player known for his skills as a pitcher. He was born on June 1, 1994, in Osaka, Japan. Yamashita has played for various teams in the Nippon Professional Baseball (NPB) league, showcasing his talent and contributing to his team's success. Throughout his career, Yamashita has gained recognition for his strong performances and ability to handle pressure during games. His dedication to the sport has made him a respected figure among fans and fellow players alike. He continues to be an important player in the world of Japanese baseball.