Raiken is kinda Japanese. You see, Raiden is a name that means thunder/lightening and "ken" is a word for blade, sword, ect. Therefore, raiken loosely translates to lightening blade (the "zera" part is a carry-over from my old name).
Tch, I hear enough of those jokes irl, quite frankly they sicken me... The last video game I played was pokemon black, partially just to show my friend how much he sucked at the game.