Keio Senior High School
The high school division began in 1948 as High School 1 and High School 2. The current enrollment is some 2,200 students (boys), making it the largest affiliate in the Keio system. The school prides itself on its excellent human resources as well as diversity. Located on the Keio University Hiyoshi campus, this high school has begun an advanced placement program in conjunction with the Faculty of Business and Commerce to offer a seamless transition between secondary and university education.

