Seisen International School in Tokyo - An IB World School

Name

Seisen International School in Tokyo - An IB World School

Legal name

Seisen International School（清泉インターナショナル学園）

Website

https://seisen.com

Company type

Private

Founded year

1962

Operating status

Operating

Ownership category

akta.pro rank

Product category

International K-12 Education

NAICS

Elementary and Secondary Schools (6111)

SIC

Services-Educational Services (8200)

akta.pro primary industry

International/Global Curriculum Schools (IB, Cambridge, etc.) (EDAJABAG)

akta.pro secondary industries

International Curriculum Early Learning Academies (e.g., IB Early Years) (EDACADAK), Language Immersion & Bilingual Private Schools (EDAJABAL)

Keywords

• International education
• IB world school
• K-12 private school
• Catholic school
• Montessori kindergarten

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Infrastructure, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Tuition Fees: Annual tuition charged by grade level - Kindergarten Half Day JPY 1,600,000, Kindergarten Full Day JPY 2,500,000, Elementary (Grades 1-5) JPY 2,650,000, Middle School (Grades 6-8) JPY 2,700,000, High School (Grades 9-12) tuition as published.
2. Application Fee: Non-refundable application fee of JPY 30,000 for each application submitted.
3. Registration Fee: One-time non-refundable registration fee of JPY 300,000 upon acceptance.
4. Land and Building Development Fee: One-time fee of JPY 700,000 for new students upon acceptance, non-refundable after attending any portion of school year.
5. Building Maintenance Fee: Annual building maintenance fee of JPY 150,000.
6. School Bus Service: Annual bus fees - One Way: JPY 310,000, Round Trip: JPY 420,000, prorated quarterly if needed.
7. Corporate Contribution Plan: Corporate scholarship program for foreign-based corporations responsible for expatriate employees' educational expenses.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels9 records

Core offering

Seisen International School delivers a Catholic, English-medium Kindergarten-through-Grade-12 international education in Tokyo, offering the full International Baccalaureate (IB) Continuum — PYP, MYP, and DP — alongside a unique co-educational Montessori/IB PYP Kindergarten (ages 2-5) and an all-girls environment from Grade 1 through Grade 12. Core academic programs are supplemented by English as an Additional Language (EAL), Learning Support, STEAM education, Athletics, Fine and Performing Arts, and after-school activities. The school serves approximately 700 students representing over 40 nationalities, supported by 99 international teaching staff at a 7:1 student-to-faculty ratio.

Product overview

Seisen International School offers a comprehensive IB Continuum educational program from Kindergarten through Grade 12. The school operates as a co-educational Montessori/IB PYP Kindergarten (ages 2-5) transitioning to an all-girls environment from Grades 1-12 featuring IB PYP, IB MYP, and IB DP programs. Supporting programs include EAL, Learning Support, Athletics, Fine and Performing Arts, and after-school activities. The school utilizes integrated technology platforms including Seesaw, Managebac, Veracross, and Magnus Health for educational delivery and administration.

Differentiator

Problem solved

Functional benefit

Products and services

• IB Diploma Programme (DP) Two-year pre-university program for Grades 11-12 offering three pathways: full IB Diploma, IB Courses, or Seisen High School Diploma. Prepares students for university entry worldwide.
• IB Middle Years Programme (MYP) Five-year program for Grades 6-10 encouraging students to make practical connections between studies and the real world through global contexts.
• IB Primary Years Programme (PYP) Transdisciplinary curriculum framework for ages 3-12 focusing on holistic child development addressing physical, social, emotional, cultural and academic well-being.
• Montessori/IB PYP Kindergarten Program Co-educational program for ages 2-5 combining Montessori approach with IB Primary Years Programme elements. Features multi-age classrooms and 830 square metre private playground.
• Elementary School Program (Grades 1-5)

Quantifiable outcome

• 100% of graduates pursue higher education at universities worldwide
• +3 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability2 records

Feature4 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• Handmaids of the Sacred Heart of JesuscoreStrategic or Co-development PartnerSponsoring religious order founded in 1877 by Saint Rafaela Maria Porras. Operates Seisen Jogakuin Incorporated Educational Institution consisting of nine Seisen schools. Sisters continue to support spiritual life of the school with convent located on campus.
• Seisen Jogakuin Incorporated Educational InstitutioncoreStrategic or Co-development PartnerParent organization consisting of nine schools: Seisen University (Nagano), Seisen University Junior College, Seisen University (Tokyo), Nagano Seisen Jogakuin Senior/Junior High School, Seisen Senior/Junior High School, Seisen Elementary School, and Seisen International School. Bears full legal and financial responsibility.
• Cezars KitchenminorOthersMeal caterer providing hot lunch program for students in Grades 1-12
• SEARCH AssociatesminorChannel Partner/ Reseller/ DistributorInternational placement organization used for teacher recruitment
• Times Educational Supplement (TES)minorChannel Partner/ Reseller/ DistributorInternational placement organization used for teacher recruitment
• Japan Council of International Schools (JCIS)coreStrategic or Co-development PartnerMember school organization. Mid-year transfers between JCIS member schools require prior consultation between Heads of both schools.
• Sister Schools (22 countries)coreStrategic or Co-development PartnerInternational network of schools founded by Handmaids of the Sacred Heart of Jesus including schools in Japan (Kamakura, Nagano, Nagoya, Tatebayashi, Tokyo), Philippines, Vietnam, Peru, USA, Spain, and many other countries. Students participate in cultural exchanges.
• EARCOS (East Asia Regional Council of Schools)minorStrategic or Co-development PartnerProfessional organization for international schools in East Asia. Seisen participates in job alike sessions and collaborative projects.
• CIS (Council of International Schools)coreStrategic or Co-development PartnerInternational schools accreditation body. Seisen is CIS accredited along with NEASC. Staff participate in professional development through CIS.

Scale indicators11 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• The British School in Tokyo: Premium Tokyo-based international school offering a full K-12 IB programme to expatriate and bicultural families. Direct competitor for the same expat family segment with similar tuition tier and IB-Continuum positioning.
• American School in Japan (ASIJ): Largest U.S.-accredited international school in Tokyo, offering IB programmes across a co-ed K-12 campus. Most direct large-scale competitor to Seisen for expatriate family enrollment and university placement outcomes.
• International School of the Sacred Heart: Catholic international school in Tokyo founded by the Handmaids of the Sacred Heart of Jesus — the same religious order that sponsors Seisen. Direct peer sharing sponsor, mission, and admissions market, also offering IB programmes.
• St. Mary's International School: Catholic, all-boys international school in Tokyo with IB Diploma Programme. Operates in the same Tokyo Catholic-international-school ecosystem as Seisen; complementary gender positioning makes it a direct mirror peer for family choice.
• United Nations International School (UNIS): UN-affiliated international school in Tokyo offering IB programmes across K-12. Competes with Seisen for diplomatic, multinational, and bicultural family enrollment at premium price points.
• Nishimachi International School: Tokyo-based K-9 international school with strong Japanese-English bicultural mission. Comparable in scale and fee structure; competes for bicultural and Japanese returnee families entering the IB pathway.
• Canadian International School Tokyo: Tokyo-based IB school (PYP/MYP/DP) targeting similar expatriate and bicultural family segments. Direct competitor for premium tuition tier and university-prep positioning.
• K. International School Tokyo: IB-authorized K-12 international school in central Tokyo. Competes for similar expatriate family demographic with comparable fee structure and IB-Continuum positioning.

Regional players

• Yokohama International School: IB Continuum school serving the greater Tokyo area from Yokohama. Comparable programme offering and tuition tier; competes for expatriate families willing to commute or relocate slightly outside central Tokyo.

Others

• Council of International Schools (CIS): Global accreditation body of which Seisen is a member. Relevant ecosystem participant: CIS accreditation standards, peer evaluation processes, and professional development shape the competitive set and quality benchmarks for Tokyo international schools.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UC-sW9f-fF6topSFYgYySLbA
• Facebookfacebook.com/seisensetagaya
• LinkedInlinkedin.com/company/seisen-international-school
• Instagraminstagram.com/seisen_setagaya

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles16 records

Subsidiaries8 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seisen International School in Tokyo - An IB World School