"Saya suka budaya Jepang."

Translation: I like the Japanese culture.

[Rick392366]

Saya suka budaya Jepang.
Meaning: I like Japanese cultures.

'I like Japanese culture' = also accepted as a correct answer.

'Japanese cultures' (plural form), can it be said like that in English ?

[JamesTWils]

Well, you might say that, I suppose, if you were emphasizing some sort of Japanese multiculturalism, e.g. the Ainu, Ryukyuans, etc.

[AlexErdman]

Though while it is still correct it would be less common than a simple "Japanese culture"