Throughout Asia, she is referred to as the "Empress of J-pop." To her fans, she is simply Ayu: artist, performer, businesswoman, fashion icon and idol. Over the span of nearly two decades, Japanese ...

If there's anyone who knows the power of a pop ballad, it's Mariah Carey. With hits like, "We Belong Together" Carey became one of the biggest pop icons of our generation. And now she's at it again.

K-pop has become a global sensation, with acts like BTS and Blackpink amassing fans far beyond Asia. J-pop—which ranges from the electronic synth sounds of YOASOBI to the pop-punk anthems of One OK ...