Kōtarō Makaritōru!

Among the very first manga that I read. And still one of my fave.

It consists of 3 major titles:

- Kōtarō Makaritōru! (Karate): 59 volumes

- Shin Kōtarō Makaritōru! (Judo): 27 volumes

- Kōtarō Makaritōru! L (Ninjutsu): 8 volumes

Too bad I can't collect them all during my childhood.

Wikipedia: Kōtarō Makaritōru!

Anime News Network: Tetsuya Hiruta