Changed music info in iTunes doesn't sync to iPhone

　I bought songs from iTunes Store and I want to change its info such as artist name, album etc. (because some info has been romanized from iTunes Store, but I prefer it to be shown in native language (e.g. Japanese, Thai)) However, even changes are shown perfectly in iTunes, but they did not come to my iPhone as well (they did not sync). What should I do?

Things I have done (but did not work)

- remove song and resync (both in iTunes and iPhone)

- move song from itunes library directory to another directory and add that new file to iTunes again, then sync

- remove ALL songs from my iPhone (then I saw changes in iPhone, there was no song), and sync ALL songs again

Anyone could find the solution for me please? Thanks in advance.

PS. Sorry for my bad English