Accusative with nations?
Often the correct way to write the name of the nation in relation to a verb appears to be to not use the accusative on here, but one example: "Mi ŝatas viziti Japanion.", I've repeatedly found is both different to this and I keep getting wrong (I wrote "Mi ŝatas viziti Japanio"). Is this because Japan as it relates to the idea of an "old world" country? Or is there something else I'm missing? Dankon!
"Mi ŝatas viziti Japanion" estas en ordo. Viziti estas transitiva vorto kaj bezonas akuzativon.
It's just the normal accusative, and applies to every country (they're nouns, after all). Could you provide examples of where you've seen a country as a direct object where the accusative has been missing?
'Loĝi' is an intransitive verb, so there's no direct object, so you don't use the accusative.
If it were about visiting the US, you'd still write "Mi vizitas Usonon".
(Copied this from my response to @carbsrule above) One I just encountered: "Multaj poloj loĝas en Usono."