The Kumon Method began not in a boardroom, but in a family home. In 1954, Toru Kumon was a high school mathematics teacher in Japan. His son, Takeshi, was in his second year of elementary school and struggling with a recent math test. His mother, Teiko, discovered the poorly graded exam, and this sparked a conversation that would change education for millions.

Toru Kumon looked closely at the school's textbooks. He felt they didn't give students enough opportunity to practice and truly master the concepts. He believed that a strong foundation in calculation was essential for success in higher-level mathematics. Instead of just tutoring Takeshi on his current schoolwork, Toru decided to create a different path for him, one focused on building skills from the ground up.

Toru began creating his own learning materials. Every night, he would hand-write math problems on loose-leaf paper for Takeshi to complete the next day. These weren't random problems. Toru carefully designed them to build skills incrementally, starting with simple addition and gradually progressing. Each worksheet was a small, manageable step forward.

The process was consistent. Takeshi would work on the sheets for about 30 minutes each day. Toru would grade them, and if Takeshi made mistakes, he would have to correct them before moving on. The focus was on mastering each concept completely before introducing the next one. This method allowed Takeshi to learn at his own pace, building confidence with every correctly solved problem.

The results were remarkable. Through this daily practice, Takeshi’s math abilities improved significantly. By the time he was in the sixth grade, he had advanced far beyond his school level and was able to solve differential and integral calculus problems.

From this experience with his son, Toru Kumon established the foundational principles of his educational method. He saw that the key was not to teach in a conventional way, but to foster self-reliance.

This led to several core objectives:

• Individualized Learning: Students start at a comfortable level, regardless of their age or school grade, and progress at their own pace.
• Self-Learning: The worksheets are designed to be self-explanatory. They provide examples that allow students to figure out how to solve the problems independently.
• Small Steps: Concepts are broken down into tiny, incremental steps. This ensures students build a solid understanding and avoids creating gaps in their knowledge.
• Mastery: The goal is 100% understanding before advancing. This builds a strong foundation and the confidence needed for more complex topics.

Word of Takeshi's success spread among other parents. They asked Toru if he could help their children as well. In 1958, he opened the first official Kumon center in Osaka, Japan, using the same worksheets and principles he had developed for his son.