The American School in Japan, a 120-year-old international school based in western Tokyo, is planning a large-scale overhaul of its campus, including rebuilding the middle and high schools, which are each over 50 years old.

The current plan, unveiled in late April, involves six phases, with work able to proceed on the current site in a way that means all students and staff can remain on campus throughout the process. The renovation, once approved by ASIJ’s board of directors, will likely take a decade or more to complete.

Jim Hardin, ASIJ’s head of school, said the plan would put the school and community “in a very special place.”