Tokyo Bay International School

A young Cambridge plus Montessori school in Koto-ku on the eastern Tokyo Bay side, building out from early years toward upper secondary. A reasonable option for families on the Bay side who want an English-medium school at a lower price point.

TBIS opened in 2018 in Kameido and runs a Montessori-influenced early years phase that transitions into Cambridge Primary, IGCSE and A-Level. The location sits closer to Disney Resort and the Chiba border than to central Tokyo, useful for families along the Sobu and Keiyo lines. The school is small and the multicultural mix is genuine.

Reviews split. Families praise the personalised attention, communication from the office, and the rate of progress in younger children. Staff turnover is the other thread, with departing teachers flagging pay and teacher qualifications as concerns. Tuition runs well below the established Tokyo names, which is part of why the school exists in the form it does.

• The small parent-review sample is positive, with praise for personalised attention, helpful staff, a good environment, and exposure to newer education technologies.
• Directory research raises a practical caution around fees and refunds, noting that a clear public refund policy was not found and that parent reports mention non-refundable or partly refundable charges.
• Signal is still thin. The public review pool is small, so the safest reading is early positive parent sentiment plus limited transparency around payment terms.