What is a dojo that continues to train champions?

Shitokai Eishinkan in Yamanashi Prefecture has trained many champions.
The teacher is Mr. Katsuhide Hasegawa, who himself has a career as the world champion.
When I went to the interview, there was a lively practice scene of children.
What is the essence of winning? Why are children so lively?
A must-see not only for those involved in karate, but for anyone involved with children!
In four parts, we will talk about how the children, who had some problems when they joined, smiled and became independent and enthusiastic about their karate lessons.