The Marist Brothers International School Parent-Teacher Association was established in 1956. The PTA aims to support the school through its community, and to increase communication and cooperation between parents and the school. All members of the community are welcome and encouraged to join the PTA. Regular open meetings are held throughout the year.
The PTA is responsible for organizing the annual MBIS Food Fair. This event is the associations primary source of fundraising – with over 2,000,000 yen raised each year. All Food Fair profits go back to the school. Other recent PTA activities have included: