Korean Pop is big business in Japan - you see and hear a lot of it on TV and while walking out n about town. K-POP has been around for a while in Japan but seems to have really taken off last year in 2010 with groups like Girls Generation
(少女時代) who reached top 2 in the Oricon charts
with "Gee" and KARA
reaching top 5 with "Mister."