He played for Yokohama, FC Kawasaki CHAMP and Maebashi Ikuei HS during his youth.
After studying at the Maebashi Ikuei High School, Kasayanagi joined V-Varen Nagasaki ahead of the 2022 season.
[1][2] He made his debut for V-Varen in a 1–0 loss against Zweigen Kanazawa, coming on in the 80th minute for Takashi Sawada.
[4] Tsubasa has international caps at youth level for Japan.
This biographical article related to a Japanese association football midfielder born in the 2000s is a stub.