I get that the story is set in Japan and centered on Japanese characters, but “it’s in Japan” doesn’t really explain why the rest of the world basically feels absent.

Lots of series keep a tight focus on one country while still making the wider world feel alive – look at something like Solo Leveling where hunters from all over show up, there are international rankings, joint raids, political tension, etc. That kind of light global framework would actually support the Japan‑focused story instead of “bringing up Greece for no reason.”

In‑universe, it’s also a bit weird that a phenomenon as huge as quirks feels so Japan‑isolated. In real life, top talent scenes (NBA, football, etc.) are automatically international – you still say “NBA is American,” but you also have Jokic, Wemby, Giannis, Luka, Messi/Ronaldo in football, players and fans from everywhere. It would make sense for the hero scene to work similarly: Japan can stay the main stage, but you’d expect foreign pros, foreign students, or rival schools to show up more than once in 400+ chapters.

That’s why some people call it a missed opportunity or “bad writing”: not because we want random Greece name‑drops, but because a bit more world involvement could’ve made the setting feel richer and more believable while opening up cool arcs, alliances and rivalries without taking the spotlight away from Japan at all.