It probably has to do something with Japan since the sun is their historical symbol and maybe its past history.DUDE, WHY DOES THIS SOUND SO FIRE?
It also has a lot of weird possibly implied occult meanings. I could be wrong though. But then there's that forked blue tongue and the black goo. Man this game is gonna be so deep isn't it. All those references to "Light" in regards to both brightness and weight and "the sun" (another light source)
It's almost as if the song is being sung from the perspective of... welll.... a certain bad guy.
Flag of Japan