Yokohama International School

Yokohama International School was founded in 1924 and opened on October 27, 1924 in a YMCA classroom with six students and one teacher. It was among the first schools to include 'international' in its name, and by the late 1930s enrollment exceeded 100 students with a boarding facility added in 1936. The school closed during World War II, its campus was destroyed by fire in 1945, and it was rebuilt and reopened in 1955 on its original Yamate site. YIS became a registered School Juridical Person in 1969, introduced the IGCSE in the 1990s, and offered the IB Primary Years Programme from 2001 with a full Early Learning Centre–High School structure by 2003. In January 2022 the school moved to a new Honmoku campus designed by Kengo Kuma & Associates, and the centenary was celebrated on October 27, 2024.

The close friendships and cooperation between students, staff, parents and alumni lie at the heart of YIS. A range of events and activities are offered by the Parent Teacher Student Association (PTSA), supporting learning opportunities and community engagement. The Food Fair is a hallmark event that unites the YIS community and nearby neighborhoods in a festival of food and culture. Alumni remain connected after graduation, with many returning as staff or as parents of current students.

The Parent Teacher Student Association (PTSA) provides a calendar of events and activities for families, supports learning opportunities, and drives community engagement. The Food Fair is the largest annual PTSA-led event, attracting thousands of attendees and involving hundreds of volunteers across many booths and cultural presentations. Proceeds from the Food Fair fund the PTSA Grants Program, which supports student and wider-community projects. Culture Workshops at Food Fair bring immersive country experiences to the school community, expanding intercultural understanding. The PTSA and school collaborate to foster parent involvement, fundraising, and service opportunities across the year.