By the way cool.
Sephiroth is left handed I agree with Chaosbayne however I believe he is also right handed for in advent children there is a couple parts where sephiroth is using his right. In fact if you watch closely during a chapter in crisis core just before you face bahamut Fury a scene will start showing sephiroth attacking a genesis clone with masamune in his right hand. In ffvii during the scenes you encounter sephiroth he will be holding his sword in his right. I know this because I've played FFVII watched Crisis Core vids on youtube and such.
You do realize Sephiroth is left handed right?
Yes, but i assure you that is really hard to hold a 68" masamune if you're not left handed XD It's heavy xD
Looks like they have been playing around in the Matrix. lol