>>280430308
Arabasta and Wano being near-perfectly circular islands almost the size of Australia is just a case of Oda’s eccentric japanese way of explaining an island’s sheer size. When Oda described Arabasta’s and Wano’s size, as well as the range of Viola’s devil fruit powers, they’re always 4000 km, because Oda likes using the japanese unit of measurement “ri”, and he keeps using the phrase “1000 ri” to make his japanese readers understand that the place is huge.

1 ri is 3.927 km in radius, meaning 1000 ri is 3927 km in radius, hence why the manga keeps throwing “4000 km” around.

I used to believe that the One Piece world is, like, almost Jupiter-sized or something to accommodate all the crazy shit in it, but ever since the three eras were revealed, and the first era’s denizens were entirely human, I’m led to believe that One Piece is indeed set in a heavily-altered version of our world.

>>280430337
And? It’s drowned to hell due to ancient weapons like Uranus permanently disfiguring the land, thus raising the sea levels.