That anime is one of my favorites. The main characters are pretty anime-ish, all anime protagonists from that time look more or less the same, but the older adults (apparently Go is a bit of an old person's game in Japan) are drawn in a more naturalistic style with a lot of character.

> in Go there’s this unspoken understanding that if you drive people away, you’ll have no one left to play with.

Definitively not in online Go. I ran into some people who clearly thought racist trash-talk was a way to reduce the competition.