It's the OST of 'Kikujiro's Summer', which already has many arranged versions.
It's a good song to listen to, but it's a song that you can't play beautifully because of the difficulty of accompaniment of your left hand.
Kids love it, but it's hard to play the original song.
I solved it with 4 hands piano version.
Make a great song with your collaboration. :)
It was arranged in the same length by referring to the performance video of Hisaishi Jo.
I recommend a great finale song for the children's concert.