Kousuke Ooshiba is a fictional character from the popular manga and anime series Kono Oto Tomare!. He is known for his talent in playing the koto, a traditional Japanese string instrument. Ooshiba is depicted as a passionate and dedicated musician, often striving to improve his skills and inspire others around him. In the series, Ooshiba plays a significant role in the koto club at his school, where he helps fellow members develop their abilities. His character embodies themes of friendship, perseverance, and the importance of music in connecting people.