JPop@Japenese Pop

J-pop (or Jpop) is an abbreviation of Japanese pop. It refers to Western-influenced Japanese popular music. The term is widely used to describe different musical genres of pop in Japan.

Japanese stores typically divide their music into four sections: J-pop, enka (a traditional form of ballad), classical, and English/International. Some songs, such as those by Miyuki Nakajima and Anzen Chitai, represent a fusion of enka with J-pop.

credit: http://en.wikipedia.org/

This is the my favourite song from Japenese. Almost of my Japanese song is JPop. In Japan, It have Oricon Chart where it will state popular song of the week, month or year. There, you also can know how much singles they have sold. Single is a release before a artist release an album.
This is what I know about that.... :P