Hmm, if you mean champion, it should be 覇者 hasha, at least.
But I don't recommend to get a tattoo of a word from a language you really don't know/understand. If there's any mistakes, you can throw away if it is done on your T-shirt, but if it is on your skin - you have no choice but to live with it for the rest of your life.
Besides, tattoo artists who don't know Chinese/Japanese characters can do it really badly.