Kaiji Sakomizu is a middle school homeroom teacher in Mai-HiME. A similar character, Sakomizu Cardinal, appears in Mai-Otome.
Sakomizu wears a Van Dijk bears and afro hairstyle and enjoys gardening. In addition, he has extensive knowledge of First District, often passing information along to Natsuki Kuga.
Students in his class include Takumi Tokiha and Akira Okuzaki.
In the Mai-Otome omake, Sakomizu is seen with a new student, Arika Yumemiya.