Taiwanese pop
K-pop is one of two popular trends going on over in Japan, the other being Taiwanese pop (sung in Mandarin Chinese). There is a word for this phenomenon in Japanese called (pronounced Tairyū), which literally means the influx of Taiwanese pop culture in Japan. This trend has been prevalent in Japan for quite some time though, with Taiwanese idol dramas like "Meteor Garden", "It Started with a Kiss", "Hot Shot", and soon "Autumn's Concerto" making waves in Japan, while Japanese artists like Gackt making frequent visits to Taiwan for pleasure.