Learning
Students are encouraged to act on their learning so they might positively impact their own lives and the lives of others.
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Living
Within our international multi-faith community lies our greatest strength, but also our greatest challenge as to how we let every voice feel heard and included.
Loving
While academic achievement is central to life at Seisen, we also emphasize student leadership, spirituality and service.
A Catholic Kindergarten to Grade 12 IB international school in Tokyo
Preparing global leaders, critical thinkers and compassionate women for tomorrow.
Our Stories
Learning to Love, Loving to Learn since 1962
Mary Chu, 1980s (SFSA President)
Ms. Grantham, P.E.
Tsuji Family
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Mary Chu, Seisen Former Students's Association President
“Every memory of Seisen is wonderful which includes the Sisters, my friends, teachers, staff, classes, participating in extracurricular activities, and being involved at school. What they all have in common is that as a child and student, I knew that I belonged at Seisen. As students, we always accepted each other even for our differences in culture, religion, and opinions. We didn’t judge and were never judged. I’m grateful to my parents for choosing Seisen for me since Seisen is a big part of who I am today."
Tsuji Family
As an international school graduate and father of two boys , I have gotten to know Seisen and its environment from many angles throughout the years. I share many precious memories with Seisen graduates and have been blessed to get to know the faculty and staff after enrolling both my sons in Seisen kindergarten. My wife and I wanted my eldest son to experience a Montessori education before St.Mary’s and my youngest son is currently following in his footsteps. I was delighted to see both my sons enjoy and learn so much in Seisen’s unique environment and am grateful to share this special experience with them. Seisen’s education system had always impressed me as a student, and now as a father, I feel the curriculum has kept evolving and enhancing year after year. Needless to say, I have utmost faith in Seisen’s highly trained and experienced teachers who continue to provide a priceless education to all.
We love Seisen and are proud to be a part of the greater Seisen family!
Facts & Figures
The Seisen Story
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The Seisen Experience
Programs & Features
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Ethos
Spiritual Life
The Seisen Story in International Education is a story grounded in an educational philosophy of love and service as nurtured by the Handmaids of the Sacred Heart of Jesus
Arts
Fine and Performing Arts
Students are able to use their creativity and explore many forms of art.
Athletics
Athletics
Team membership provides experiences that help students grow and develop both in the athletic environment and the classroom.
Innovation
Women in Science and Technology
Passionate and motivated students pursue science to a higher level in an international environment.
Community
Home-School Partnership
Parents organize a variety of activities for further strengthening Seisen community.
Leadership
Staff Who Care
A professional, international staff of 99 teachers from 23 countries provide a safe and challenging CIS/NEASC accredited education for our students.
News & Events
The latest school updates
![Seisen Jazz Band performs at 2023 Kanto Plain Jazz Festival]([{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_1/v1678163269/seisencom/ieal5h1b0qrg9s39ehdf/ScreenShot2023-03-07at131952.png","width":256},{"url":"https://resources.finalsite.net/images/f_auto,q_auto/v1678163269/seisencom/ieal5h1b0qrg9s39ehdf/ScreenShot2023-03-07at131952.png","width":474}])
The ensemble was lauded for their excellent blend and the high quality of solos by the guest adjudicators, and their performance was well received by the audience who clapped along to their numbers.
![Voices Ring Out at Choral Festival & Honor Choir Performances]([{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_1/v1678145641/seisencom/gpdc7knrxyqscwab5pyi/ScreenShot2023-03-07at82718.png","width":256},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_2/v1678145641/seisencom/gpdc7knrxyqscwab5pyi/ScreenShot2023-03-07at82718.png","width":512},{"url":"https://resources.finalsite.net/images/f_auto,q_auto/v1678145641/seisencom/gpdc7knrxyqscwab5pyi/ScreenShot2023-03-07at82718.png","width":656}])
Seisen choir members experienced their first KPASS ChorlalFestival.
![2023 Kanto Plains Middle School Brain Bowl Competition Report]([{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_1/v1676252744/seisencom/asokxcjnxu1p9nyouwko/ScreenShot2023-02-13at104313.png","width":256},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_2/v1676252744/seisencom/asokxcjnxu1p9nyouwko/ScreenShot2023-02-13at104313.png","width":512},{"url":"https://resources.finalsite.net/images/f_auto,q_auto/v1676252744/seisencom/asokxcjnxu1p9nyouwko/ScreenShot2023-02-13at104313.png","width":520}])
102 students from 9 schools competed at Tokyo International School
![A-Team Season and Success! 2023 Middle School Soccer]([{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_1/v1675833649/seisencom/qhvarnffqvmj1i8yse4m/Screenshot2023-02-06at173213.png","width":256},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_2/v1675833649/seisencom/qhvarnffqvmj1i8yse4m/Screenshot2023-02-06at173213.png","width":512},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_3/v1675833649/seisencom/qhvarnffqvmj1i8yse4m/Screenshot2023-02-06at173213.png","width":800},{"url":"https://resources.finalsite.net/images/f_auto,q_auto/v1675833649/seisencom/qhvarnffqvmj1i8yse4m/Screenshot2023-02-06at173213.png","width":930}])
For the first time in the history of Seisen International School, our Middle School Soccer A-Team not only won six games back to back but made it to the finals, fighting for a first-place championship title.
![Aviation Industry Internship Introduces Students to New Field]([{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_1/v1675043982/seisencom/ub9il4cazb8whwzl3tdg/5_3.jpg","width":256},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_2/v1675043982/seisencom/ub9il4cazb8whwzl3tdg/5_3.jpg","width":512},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_3/v1675043982/seisencom/ub9il4cazb8whwzl3tdg/5_3.jpg","width":800},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_4/v1675043982/seisencom/ub9il4cazb8whwzl3tdg/5_3.jpg","width":1200},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_5/v1675043982/seisencom/ub9il4cazb8whwzl3tdg/5_3.jpg","width":1600},{"url":"https://resources.finalsite.net/images/f_auto,q_auto,t_image_size_6/v1675043982/seisencom/ub9il4cazb8whwzl3tdg/5_3.jpg","width":2200}])
Universal Aviation hosted Seisen HS students for internships over Winter Break.
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Kamiyoga Art Hall