There are SIX international schools in Tokyo offering K12 education.
If you want to explore more schools, you can check out International schools in Yokohama. There are many people working in Tokyo and living in Yokohama for the sake of school and other reasons like proximity to their community. And Vice versa.
Click the below school name(s) to get the details of the international school.
Seisen International School
Setagaya ku, Tokyo
St. Mary's International School
Setagaya ku, Tokyo
K. International School Tokyo
Koto ku, Tokyo
Indian International School
Koto ku, Tokyo
Global Indian International School Japan
Edogawa ku, Tokyo
Aoba-Japan International School (Hikarigaoka Campus)
Nerima ku, Tokyo