Maybe something more like: えっ？全然興味ないんだけど。日本にいるんじゃん？ Sorry to kill the joke, but if Google translates it into grammatically correct English, the source was not

Maybe something more like: えっ？全然興味ないんだけど。日本にいるんじゃん？ Sorry to kill the joke, but if Google translates it into grammatically correct English, the source was nothing resembling Japanese.