K-pop proved its popularity in Japan through the 'Top 10 Most Popular Idol Group' rankings. 

From January 8 to January 19, a total of 620,588 LINE users in Japan voted for the most popular male and female idol groups. 

TVXQ at #5, Big Bang at #7, and BTS at #10 are the three K-pop boy groups to rank in the top 10. 

For the girl groups, TWICE is ranked at #6 and Black Pink at #10. 

You can check out the detailed rankings for the male groups here and for the female groups here.