In 2006, for example, out of 237 students who entered the senior or final year, 232 were admitted to the various campuses of Keio University.

Most of the teachers teach in both the Junior and Senior schools, which share the same buildings, which is uncommon in Japan.

The school operates on a trimester system with a five-week summer vacation and a three-week break at the end spanning late December and early January.

[citation needed] The school is co-educational and the number of boys and girls is effectively equal.

Most of the teaching staff are Keio University graduates, many with master's degrees, which is unusual among secondary educators in Japan.