Learning to Love, Loving to Learn

We are


Share your Phoenix Pride

Seisen International School Students are


Learn about 

Leadership at Seisen

Serving the Tokyo Expatriate Community

Since 1962

Learn about our tradition of education.

Seisen International School Students Are

Globally Minded

Learning to Love, and Loving to Learn

Through Collaboration and Community


The only Kindergarten in Setagaya accredited by:

Japan Council of International Schools

Why is JCIS accreditation important?

Seisen International School students are


Seisen is a Catholic school that encourages students to develop their own beliefs

Learn more

Seisen Students Are



Learn More about IB-PYP at Seisen

Seisen International School students are


Provocations in the PYP

Provocations generally take place at the beginning of a unit of inquiry. Although sometimes there may be opportunities or needs to provoke students thinking throughout the unit of inquiry also. 

STEP UP For Mental Health

This year, TELL has designed an event from September 10th to October 10th to 'STEP UP' and make a noise about mental health and walk 20,169 steps to honour the 20,169 lives lost to suicide in Japan last year. 

Play within the PYP!

This week our PE teacher, Rachel Grantham, and PYP coordinator, Serrin Smyth, facilitated a workshop for Kindergarten and Grade 1 teachers which looked at the role of play within the PYP. 

A Catholic K-12 IB international school in Tokyo,

preparing global leaders; critical thinkers and compassionate women for tomorrow.

Seisen is an authorized  IB Diploma Program (DP) IB Middle Years Program (MYP) and Primary Years Program (PYP) School. 

From Setagaya to some of the best post secondary institutions in the world.