SIS is an all-girls’, grades 1-12 Catholic school, with co-ed Montessori Kindergarten, located in Tokyo, Japan. Students and faculty from over 60 countries are represented at SIS, with English being the main language of instruction.

How did Seisen start?
“Begin?...It didn’t begin! It just happened,” laughed Sister Carmen. “After the war, Air Force families asked us to run a Kindergarten right where we already had one of our missionary schools in a rambling house at Hatsudai, Yoyogi. So, we did. Years later they pleaded, ‘Sisters, couldn’t we have a first grade?!’ ‘All right,’ we said, ‘but no more, that’s all!’ Every fall we say no more, but somehow here we are, all the way to ninth grade!! There is a need, so...”

The school is located in Tokyo’s largest residential area, Setagaya-ku. It is easily accessible from downtown Tokyo by subway, train, public bus, or school bus.

Seisen is operated by the Handmaids of the Sacred Heart of Jesus under the auspices of the Seisen Jogakuin Educational Foundation. The order was founded in 1877 by Saint Rafaela Maria Porras to dedicate its efforts to educational activities.

Seisen is accredited by the Western Association of Schools and Colleges, the European Council of International Schools, and the Japanese Ministry of Education. Its memberships include the Japan Council of Oversees Schools, the Kanto Plains Association of Secondary School Principals, and the East Asia Council of Oversees Schools.