Seisen International School

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Seisen International School
12-15 Yoga 1-chome,
Setagaya, Tokyo 158-0097
Tokyo, Japan
Type International School
Motto Ad Finem Fidelis (Faithful Until the End)
Established 1949
Founder Asunción Lecubarri y de Arri
School district Setagaya, Tokyo
Head of school Colette Rogers
Grades K-12
Number of students 725
Colour(s) Maroon and White
Mascot Phoenix
Affiliation Catholic

Seisen International School (SIS) is an all-girls,[1] Catholic school[2] located in Setagaya-ku,[3] in Tokyo, Japan. Students and faculty from over sixty countries are represented at Seisen, with English being the main language of instruction. It offers the International Baccalaureate program for grades 11 and 12.[3] It is accredited by the Ministry of Education, Culture, Sports, Science and Technology (Japan), New England Association of Schools and Colleges and the European Council of International Schools.[3] It teaches Montessori kindergarten (coed, ages 3–6) and grades 1-12 (girls only, ages 6–18).[3]

According to the Good Schools Guide International, "The school is popular and has a good reputation."[4]

According to Anne-Marie De Mejía, Seisen International School provides a specifically Christian orientation in its programmes.[2]


The school was founded in 1949 by Sister Asunción Lecubarri from the Handmaids of the Sacred Heart of Jesus[3] in response to requests from United States Air Force families seeking an education for their children. The school began as a kindergarten in 1949 with four American students, moved to Gotanda in 1962 with 70 students and added a first grade. By 1970, the school was up to grade 9 and in 1973, a year after Seisen was moved to the present location in Yoga, the school was extended to include Grade 12.[5]

CIS International Schools Directory 2009/10, mentions that Seisen has approximately 700 students from around 60 nations.[3]

Campus overview[edit]

There are 35 general classrooms, 3 indoor playrooms, a multipurpose room and a kindergarten hall. The facilities also include three science laboratories (for biology, chemistry, and physics classes), a cafeteria, a drama room, a music room, an art room, a pottery room, a media center, and a computer center which includes a large computer classroom, a smaller, drop-in computer lab which is available both during and after school, and an Information Technology room. The school has an infirmary and a full-time nurse on duty. The facilities also include a convent building and a chapel. In 2013, a new futsal field was added to expand the ever-growing Seisen campus, as well as to provide further opportunities for physical exercise, including PE classes and extracurriculars.

The school’s libraries together have a collection of more than 18,000 volumes and subscribe to 65 periodicals and 6 newspapers. The media center houses filmstrips, records, cassettes, maps, transparencies, and audiovisual equipment.

Sports facilities include tennis courts, three playgrounds, a kindergarten play area (with sandbox and play equipment), and a full-size gymnasium with a locker room. The swimming pool at St. Mary's International School is used for the swimming team.


Hikaru Utada, a popular female Japanese Pop Singer, who later transferred to the American School in Japan.

CL, a popular female Korean Pop Singer from group 2ne1.


  1. ^ Alan Stephen (23 July 2008). Immigration To Japan. p. 27. ISBN 978-1-4357-4431-8. Retrieved 18 June 2012. 
  2. ^ a b Anne-Marie De Mejía (2002). Power, Prestige, and Bilingualism: International Perspectives on Elite Bilingual Education. Multilingual Matters. p. 190. ISBN 978-1-85359-590-5. Retrieved 18 June 2012. 
  3. ^ a b c d e f The Council of International Schools (October 2009). CIS International Schools Directory 2009/10. John Catt Educational Ltd. p. 284. ISBN 978-1-904724-68-1. Retrieved 18 June 2012. 
  4. ^
  5. ^ JEFFS, ANGELA. "New broom sweeps Seisen into the 21st century". The Japan Times. Kabushiki Kaisha Japan Taimuzu. Retrieved 18 June 2012. 

External links[edit]

Coordinates: 35°37′22″N 139°38′24″E / 35.622646°N 139.639986°E / 35.622646; 139.639986