Summer School
See how two weeks living device-free in a diverse community makes for a life-changing summer. For students aged 13 to 14.












UWC ISAK Japan is an international high school in Karuizawa, Japan where students from around the world learn to lead by doing.
Discover ISAKBackground video: scenes of student life across a year at UWC ISAK Japan.










UWC ISAK Japan is an international high school in Karuizawa, Japan where students from around the world learn to lead by doing.
Discover ISAK























As Japan’s first full-boarding international high school (grades 10-12), we are committed to educating intellectually curious, compassionate, and innovative students from around the world who are eager to make a difference.
ISAK's flagship Leadership Program combined with the IB Diploma Programme. A combination unlike anything else in international education.
Explore
A deliberately diverse community, immersed in Japanese culture, surrounded by the mountains of Nagano.
Life at ISAK
We look for character, curiosity, and the drive to make a difference. Does that sound like you?
Summer School
See how two weeks living device-free in a diverse community makes for a life-changing summer. For students aged 13 to 14. Explore Summer School
Winter School
Curious what an ISAK winter adventure looks like? For students aged 12 to 13 ready to step outside their comfort zone. Explore Winter School
At ISAK, we learn to identify what matters and take action. Students run online classrooms for girls in Afghanistan. Alumni build community academies in Peru and launch AI startups in Japan. The impact reveals itself, one decision, one project, one life at a time.












200 students. 80 countries. 70% on financial assistance. That is only possible because of the belief and generosity of our Founders, Catalyst Supporters, and donors. Generosity is what makes ISAK, ISAK.