He made his debut on the international stage at the 2013 East Asia Basketball Championship and stayed with Japan for the 2013 FIBA Asia Championship .
Later while attending Jinsei Gakuen High School , Watanabe was called up by Suzuki to compete with the national team in 2013 .
Watanabe made Watanabe 's debut on the international stage at the 2013 East Asia Basketball Championship and stayed with Japan for the 2013 FIBA Asia Championship .
Later while attending Jinsei Gakuen High School , Watanabe was called up by Suzuki to compete with the national team in 2013 .