They teach him hard so he can be good at school. But, his grandfather teaches him to be a noble man.
21 volumes of Kenji are talking about how people make choices whether to hurt or to be hurtled.
Kenji learns Kungfu from his grandpa. He uses his power to help other.
One day, his grandpa is gone to China. Kenji feels so sorrow. He decides to look after him. During his long trip, Kenji finds lots of lessons of humanity.
Well, basically he’s a good boy, and he grows up as good man. You see how environment gives a lot of influence to a kid! I like this manga.
Now you can also grab the torrent from bakabt.