Independence and Curiosity
Founded in 1993. Over 2,800 graduates.
Certified Montessori teachers guide each child toward independence.
Now Accepting Applications for Our 2026-2027 Winter Session
CASA ATLAS Montessori School is now accepting applications for the 2026–2027 Winter Session for children from 12 months old through early elementary school. Our Montessori and English programs offer hands-on learning in a carefully prepared environment that respects each child’s stage of development.
School tours are available by appointment. For program details and enrollment information, please visit our 2026–2027 Winter Session page.
Renewal of Our Learning Environment and Class Structure
Due to the conclusion of our agreement with RED° TOKYO TOWER, the school has relocated from Tokyo Tower. At the same time, the school name has been changed from “Red Bambini Montessori International School” to “CASA ATLAS Montessori School“.
With this transition, parts of our school structure, including class organization, have been updated to provide a clearer progression of learning.
We will continue to offer a well prepared Montessori curriculum in a calm and focused environment in Tokyo.
About Casa Atlas Montessori School
Founded in 1993 as Rainbow International Montessori School, our school began with five students and has since welcomed over 2,800 graduates.
Our Montessori environment combines carefully prepared classrooms with respect for each child’s development.
Through purposeful activity and individual guidance, children explore their interests, practise independence, and learn to express themselves.
Our Philosophy
Our Montessori approach respects children as active participants in their own learning. Through hands-on exploration in a calm, respectful environment, children follow their curiosity, make choices, and develop independence and concentration.
Our History
Since 1993, our school has provided early childhood and primary education grounded in the principles developed by Dr. Maria Montessori. Throughout our history, we have worked with thousands of families to support their children’s learning and development.
Learning Environment
Our carefully prepared, multicultural classrooms allow children to explore, concentrate, and learn at their own pace through purposeful, hands-on activity.
Teachers and Accreditation
Our Montessori-trained teachers observe each child closely and provide guidance suited to their interests, readiness, and stage of development.
Outcomes and Community
We work closely with families to support each child’s development, with an emphasis on independence, consideration for others, and participation in classroom life.
"The goal of early childhood education is to awaken children‘s natural desire to learn."
Dr. Maria Montessori
Why Montessori Education?
Montessori education has been practiced around the world for more than a century, across diverse cultures and communities. Its child-centered approach recognizes children as active learners who develop understanding through purposeful activity.
Carefully prepared environments and guidance based on observation give children opportunities to make choices, sustain concentration, and practise independence while learning at their own pace.
Prepared Learning Environment
Montessori classrooms are carefully prepared to meet children’s changing developmental needs through hands-on learning and purposeful activity.
Daily experiences offer opportunities to practise practical life skills, use language, solve problems, and work independently. Teachers observe each child’s interests, readiness, and progress, using these observations to guide their next steps in learning.
Children can develop understanding at their own pace, with individual guidance and new challenges introduced as they are ready.
To help families understand this approach in practice, we share school updates, Montessori insights, and reflections from our principal and teachers on child development and everyday classroom life.
2026–2027 Winter Session Enrollment Now Open CASA ATLAS Montessori School...Learn More
Compliance with Childcare Facility Standards Confirmed by Minato City CASA...Learn More
2026 Fall Session Applications Now Open CASA ATLAS Montessori School...Learn More
Learning Together Across Ages Montessori classrooms bring together children of...Learn More
Learning Through Active Exploration Children learn best when they can...Learn More
Our Montessori Classroom Structure
A Combined Age Approach to Support Individual Growth
Montessori education traditionally groups children in three-year age bands, including 0–3 and 3–6. Our school combines classes organized by developmental stage with opportunities for children of different ages to learn together.
Morning classes provide focused guidance suited to each child’s developmental needs, while afternoon mixed-age activities allow children to learn with and from one another. Across all classes, a calm, respectful, and multicultural environment supports purposeful activity, independent learning, and consideration for others.
Montessori Learning by Age and Stage
Mini Atlas Class
12 months – 2 years
A carefully prepared Montessori environment where young children explore movement and language, with guidance that supports emerging independence through purposeful activity.
Sunny Atlas Class
2 – 3.5 years
Children practise practical life skills, develop concentration, and learn to interact with others as they become more independent in a calm, respectful environment.
Star Atlas Class
3.5 – 5 years
Children explore early literacy, mathematics, and practical life through hands-on Montessori learning that encourages curiosity, collaboration, and responsibility.
Sky Atlas Class
5 – 6.5 years
Children deepen their learning through purposeful work and collaborative projects, with opportunities to think critically, work independently, and consider others.
School Calendar
Our school calendar lists key dates, seasonal programs, and annual school events. We share schedule changes and other announcements with families as needed throughout the school year.
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After School Programs
Our after-school programs extend learning beyond regular class hours in a Montessori environment.
With options for both Montessori and elementary school students in Tokyo, these programs offer opportunities for academic study, creative exploration, and communication, while helping children develop independent approaches to learning.
After School
Our After School program offers a range of activities and specialized classes beyond the regular school day. Children can explore new interests and extend their learning through experiences that encourage active participation, independent effort, and curiosity within a familiar school environment.
After School Studies
Our After School Studies program provides individualized guidance based on each child’s learning needs and interests. Through homework assistance, mathematics, Japanese, English, and Montessori activities, children build understanding, practise working independently, and develop consistent study habits.
Saturday Class
Our Saturday Class offers a flexible weekend program for children ages 4 to 8, combining Montessori activities, English learning, and seasonal projects. Children explore and learn through purposeful activity in a relaxed setting, while families new to our school can become familiar with our approach to learning.
Visit Our Montessori School
We welcome families to visit our school and see Montessori education in practice. School tours offer an opportunity to observe daily classroom activities, meet our teachers, and learn how our learning environment and guidance support children’s development.
Tours are available by appointment on weekdays, and you are welcome to attend with your child. For further information or to request a visit, please follow the link below to our School Tour page.
