Beating a drum is a good way for kids to learn cooperation and develop concentration.

That is what Ruriko Kikumoto, a 48-year-old music teacher at Takashima No. 5 Elementary School in Tokyo's Itabashi Ward, found when she started using drumming circles to start all her music classes about three years ago.

"I had taken part in drum circles myself, and I thought it could be used in classes," Kikumoto said.