I think I prefer American songs, especially pop, over Japanese songs overall. American songs usually consist of lyrics in English of all. Comparing with it, Current Japanese songs consist of lyrics both in English and Japanese. I think Current Japanese songs are stupid. They are hard for me to listen comfortably and understand easily it . There are many reasons why current Japanese songs consist of them.
First, japanese singers respect American songs. This is related to the time when the beginning of Japan after WW2 had finished. Japan has governed American government(GHQ general head quarters ) for a while. I don't know how long Japanese had been governed though. As soon as I get the information, I will post a blog about it. While Japan had been governed by American government,they learned anything new for them. Governed by American had not been ruled like a colony. That's why Japan has affected American culture, habits,language,anything. Because Japan had been done it, I think Japan could improve technology, lifestyle, and music.
Second, Japanese singers like to use English. Younger Japanese(under 50) people tend to use English. Older(over 50) Japanese people don't tend to use Japanese i turn. Although Japanese people like to use English, they don't like to study English.
The reason cause Japanese songs which consist of lyrics both in English a little and Japanese mostly. That's because they don't like to study English, Easy English words and sentences are used in their songs. When I go to university, I often listen to American pop music,for example, lady gaga, black eyed peas, Kanye West,and so on. Kanye West's some songs are funny.In his songs, Some Japanese phrases are used to attract Japanese fun. This is the only reason why I often listen to his songs.
Recently, The most interesting music group has been on a TV program. It is called " Syouzyo zidai". All of members of it can speak Korean,English,and Japanese. They has studied languages to be able to sing songs by using the language.In my opinion, Singing songs by using many languages can attract many fans all over the world. First singers make a hit in their country though.
Third, Some Japanese singers have ever lived in country where native English-speaker live.In fact, they are better at speaking English than Japanese. As you already know, we can soon distinguish songs by good English speaker from songs by not good English speaker by listening to their songs. There may be many reasons why they sing songs by half and half. Of course, they want to attract fans in Japan like "Souzyo zidai" as introduced above. Another reason is that they love Japan, their own country. Even if they don't be recognized formally. Their ancestors were Japanese people, and they look Japanese.
Last, Songs mixed some language often confuse me,but I don't hate it because I can understand Japanese songs more easily than American songs. I can find how I can't understand English , I don't have ability use English by listening to Japanese pop. I appreciate for Japanese pop.