http://v.youku.com/v_show/id_XMzIxMjA5ODg0.html

I found an English version of to one of my favorite Japanese songs, but it is absolutely silly!!....Why the translation from Japanese to Chinese is so perfect, while to the English version is so drab? dull...

Most probably it is constrained by the melody.  Also perhaps, it was not done professionally etc.  Just take a look at the song from Mulan done by Disney for various languages.  They did an excellent job.  Although the meaning is not exactly the same, the same general feeling is there.  As you know, even a song sung in Cantonese and Mandarin can be vastly different for the same melody unless it is in the hands of a highly skilled translator. There are also two different versions in Mandarin, one from the Mainland and the other from Taiwan.  Too bad, you can't access Youtube, otherwise I shall give you the links to what I am talking about :(