About “Kōya no Shōnen Isamu”
Kōya no Shōnen Isamu is a Japanese manga series written by Sōji Yamakawa and illustrated by Noboru Kawasaki. It was published in Weekly Shōnen Jump from 1971 to 1974. (Summary adapted from Wikipedia, CC BY-SA 4.0.)
Some summaries adapted from Wikipedia, CC BY-SA 4.0.