School Profile

The Seisen Mission

Seisen International School, a Catholic International School, educates future world citizens to become men and women for others and with others, in the spirit of Jesus Christ.

Seisen’s mission is to provide a safe environment with a focus on the multi-faceted nature of community wellbeing. We seek to empower each student, through shared responsibility, creativity, and human interdependence, to develop their unique talents and to become competent and compassionate players in our global society, capable of empowering others and of bringing hope and peace to our ever-changing world.

Seisen International School (SIS) is a private, Catholic school for girls serving the international community in Tokyo. The high school has 180 students out of a total K-12 population of 700 students representing over 50 nationalities. The aim of the high school program is to prepare young women for higher education through a comprehensive and challenging program of study.

The curriculum is taught in English and the official language of communication is English. SIS has high expectations of its students in terms of both character development and academic achievement.

Students choose between enrolling in the full International Baccalaureate Diploma program (IBDP) or the SIS Diploma program with I.B. certificates. Typically, 50% of the graduates will matriculate to North American Universities, mostly in the U.S., 25% will stay in Japan or Asia, and 25% will attend universities in Europe, mostly the U.K. 100% of the graduating class of 2019 attend 3 to 4 year institutions.

The faculty, principally trained in the U.S., the U.K., Canada, and Australia, is broadly international. Small class size and close faculty-student relationships promote a supportive atmosphere. Our students participate in a wide range of extra-curricular activities including basketball, choir, cross-country, debate, drama, international science competition team, Model United Nations, newspaper, pottery, soccer, speech, tennis, track & field, volleyball and yearbook. As a member of the Kanto Plain Association, SIS competes in academics and sports, and participates in fine arts with other international and DoDD schools.

Higher Level IB Courses Offered

Group 1

ENGLISH A (Mandatory) JAPANESE A • For bilingual or native speakers • Focus on literature

Group 2

LANGUAGE B AB INITIO • 2 to 4 years of previous experience • Beginner

*Languages offered in Group 2 are Japanese, French and Spanish.

Group 3

ECONOMICS HISTORY PSYCHOLOGY • Macro & micro-economics • 20th century Europe & East Asia • Interaction of biological,cognitive & sociocultural influences on human behavior

Group 4

BIOLOGY CHEMISTRY PHYSICS • Molecular biology, genetics & evolution, ecology, human & animal physiology, plant biology • Atomic structure, chemical bonding & structure, chemical kinetics, organic chemistry • Mechanics, thermal physics & energy, waves, electromagnetism, quantum, nuclear & particle physics

Group 5

MATHEMATICS: Analysis & Approach MATHEMATICS: Applications & Interpretation • Advanced Calculus, trigonometry, probability & statistics • Advanced probability & statistics, trigonometry, calculus

Group 6

VISUAL ARTS • Theoretical practice, art-making practice, curatorial practice Higher Level

GPA Distribution

There were 44 students in the SIS class of 2020. Cumulative GPAs reflect 9th, 10th and 11th grades. Starting in grade 11, higher level IB courses are weighted by 1.0. Only courses taken at Seisen International School are used to determine GPAs, which does not use class ranks due to small class size.

Class of 2019 Destinations

Japan & Asia (20%)
UK & Europe (20%)
US & Canada (60%)


 2016-2019  Students are encouraged to apply to a maximum of 10 institutions

Accredited by: Council of International Schools and New England Association of Schools & Colleges

External Examinations: International Baccalaureate (IB) SAT Reasoning & Subject Tests PSAT/NMSQT, Japanese Kanji Aptitude Tests

School Head: Ms. Colette Rogers

High School Principal: Mr. Alex Lee

High School Assistant Principal: Ms. Ema Alatini

College Advisor: Ms. Awing Lui

I.B. Coordinator: Ms. Veronique Maekawa

1-12-15 Yoga Setagaya-ku, Tokyo 158-0097
Japan Tel: 81-(0)3-3704-2661
Fax: 81-(0)3-3701-1033