New International School is a dual language in Japanese and English and multiage by design International School in Tokyo: Preschool (age 3) to Grade Twelve. The school is accredited by the Council of International Schools (CIS), and the Middle States Association of Colleges and Schools. and it is also a non-profit educational institution (Gakko Hojin) under Japanese law.. The school is a member of the Japan Council of International Schools (JCIS), the Tokyo Association of International Preschools (TAIP), the Progressive Education Network (PEN) and the Coalition of Essential Schools (CES).