HIS makes use of multiage instruction across the entire school in 2 year bands (K-5), a three year band in the MS (6-8) and a 2 year bands in the HS (9-10 and 11-12). Multiage instruction allows students who are ready to be challenged academically and reach for a higher standard of achievement. Likewise, it allows teachers to create differentiated learning groups that reach the learning styles and needs of all students.
In the secondary school, all instruction is differentiated according to Honors, Standard and Developing options within the class. HIS places emphasis on its core subjects as well as music and experiential (particularly outdoor) education. HIS has the highest credit requirement for graduation among international schools in Japan.