I guess it's slightly better then using random chinese characters, but i don't see why you're doing it in japanese. if you don't understand the language, then what is the significance? the answer is that asian languages carry an air of mystique for most westerners, and it makes people feel more refined and educated than getting a tatoo in a language they actually know.
i recommend this sight to anyone who is thinking about getting tatted in chinese or japanese, it might change your mind
Hanzi Smatter 一知半解