if were looking at a singer from Japan with better XK rating (thats expected K Pop chart position stats for you none nerds)
Um... what do you think the K in "K-Pop" stands for?
Google also tells me that J-Pop also exists, and "The main musical influences in J-Pop in general are rock and jazz, while Korean youth music is more influenced by electronic dance music and hip hop". I have no idea how true that is, but I expect fans of the genres can tell them apart instantly.
Incidentally there's also JK Pop, which is typically released as an incessant droning sound with transphobic lyrics.