Gon Freecss leaves home to become a Hunter and find his father. It’s a masterclass in adventure that starts light and gets progressively darker.
Why it's similar: This show captures the same sense of 'what's over the next horizon' that makes One Piece addictive. The world feels massive and lived-in, where every location has its own history and biological ecosystem.
Power comparison: Hunter x Hunter uses Nen, a highly technical energy system compared to the more straightforward Haki. Both rely on individual willpower, but Nen focuses more on complex rules and conditions.
Why watch after One Piece: Start here if you want a show where the main character’s growth feels earned through a vast, unpredictable world.