St. Mary's International School

St. Mary's International School is a private international school for boys located in the Setagaya ward of Tokyo, Japan. The school consists of an elementary, middle, and high school, all located in the Setagaya campus. The school’s primary language of instruction is English, and it also offers the International Baccalaureate program.

Originally established to serve the children of foreign residents in Tokyo with a Western-style, English-language curriculum, over time it has welcomed a growing number of Japanese students seeking international education. Though rooted in teaching of Catholic tradition, the school accepts students of all faiths and backgrounds. Religious education is offered, and Catholic students may attend Mass, though participation is voluntary.