K. International School, TokyoVerified

In Brief

If top IB Diploma results are your primary filter, KIST belongs at the top of your list - a 42.0 average in 2025 is world-class. This is a focused academic school, not an all-rounder. Go in knowing that; if that trade-off works for your family, it is an outstanding choice.

KIST's IB results are genuinely exceptional. A 2025 Diploma average of 42.0 - with 41.5 in 2024 and 41.1 in 2023 - puts it in the top handful of IB schools globally. That consistency over three years is more meaningful than any single result. For families where IB outcomes are the priority, particularly those targeting competitive universities, KIST is hard to look past. The flat fee across all year groups (JPY 2,700,000 tuition plus building maintenance) is also one of the more transparent fee structures in Tokyo.

The school is frank about what it is: an academically focused IB specialist with around 630 students from roughly 50 nationalities. It is not trying to be a comprehensive school. Families who thrive here tend to be those who want rigorous academics in a relatively compact, international environment. The Kiyosumi-Shirakawa location in Koto-ku is well connected - three minutes from the station and around 12 minutes to Tokyo station - but it is east of the typical expat belt, which some families find less convenient.

Facilities are the main trade-off. KIST has historically operated without dedicated sports or drama spaces; a new building with a gym and music rooms was completed around the end of 2023, which addresses some of that gap. If your child needs broad co-curricular options or spaces for sports and performance as part of their school life, ask specifically what is now available. The academic results speak for themselves; the question is whether the overall school environment is the right fit for your child.