Recently I have found the reason why I enjoy j-pop so much. Ever since I went to highschool, my pop music taste has been primarily j-pop. At that time, i enjoyed it mainly because there are cute japanese idols who sing cheerful tunes. But slowly, I listen to more singer-song writers who produce their own music. So what is different about j-pop than all the other pop music in general?
The main reason, as I recently found out, traces back to j-pop history. I read an article about the early influence of j-pop after 2nd world war. To start off, j-pop has its root to jazz music in the west. Jazz in usa is a form of personal expression with more complicated arrangement and irregular forms. A lot of jazz music are originated from the south where a lot of african americans reside in the late 19th and early 20th century. They are very expressive when it comes to jazz music - a lot of improvisions. With a background in piano and voice, I naturally enjoy music which are more expressive and free-form.
Another important reason why i like j-pop is because of japanese people enjoying western music. Japanese people enjoy listening to English songs even when they have no idea what the lyrics is about. This influence their music-making as the melody and arrangement of j-pop songs are always catchy and good sounding. So a lot of times we hear a lot of j-pop songs which feature very generic lyrics. It's almost like the lyrics are the leaves and music are the flowers - lyrics complementing the music. As a beginner in Japanese language, a lot of times I put more emphasis on the j-pop melodies than the lyrics. This fits my pop music profile completely as I concentrate more on the music than the lyrics of the songs.
It was the Americans who defeated Japan with 2 atomic bombs and ended World War II. But the Japanese people didn't feel ashamed of it and even borrow American culture like music and tranform it into their own materials. I admire their willingness to accept and adopt.