Koichiro Tsuzuki (都築耕一郎) is a supporting character in Black Jack, voiced in Japanese by Nozomu Sasaki. The series' music includes "【公式】ブラック・ジャック オープニング「月光花」/Janne Da Arc", "Black Jack TV Ending Theme - Kuroge Wagyuu Kamishio Tanyaki 680 Yen by Ai Otsuka".
