Musashi High School and Junior High School (武蔵高等学校 中学校, Musashi Kōtōgakkō Chūgakkō) is a private boys senior high school in Nerima, Tokyo, Japan.

The school was founded by industrialist Nezu Kaichirō in 1922 as Musashi High School, and used a seven-year system.

Musashi University was founded in 1949 and forms part of the same legal entity.

An entrance exam is required for admission.

The school aims to produce graduates who are "individuals capable of independent thought and research", and many graduates have enrolled in selective universities inside and outside Japan.