Before I saw this, I gave the Original Polish version a listen, and… unfortunately the Japanese Version won me over. Sorry, @PolandIsAStateOfMind@lemmygrad.ml.
Also sorry for linking Ingen, but he seems to be the only one with English Subtitles for everyone here to understand.
Both of them are Polish. And while we’re talking about Warszawianka, let me suggest one more version: https://www.youtube.com/watch?v=Y5sdjy5-cPc
Sorry about that! It should be fixed now. 😵💫
EDIT: Nevermind, the Original Polish Warszawianka’s also just as good (especially the one you suggested, although it’s kinda short). I just at the time didn’t notice the similar melody the JP Warszawianka had.