 If you liked
Hikaru no Go
|
 ...then you might like
Ashita no Joe
|
Both shows are very character driven stories, both main characters in the beginning hate/don't care for the sport they're forced to participate in, both main characters slowly age and grow as people as the show continues, both main characters have an experienced mentor guiding them throughout the entire show, and both shows are dramas at heart. The sport is prominent, yes, but at it's core, both shows are dramas.
Ashita no Joe is more dark than Hikaru no Go, however.