You do not want to get arrested in Japan like this guy did. You don't even have to be guilty to go to jail here. In Japan, it's often said that you're guilty until proven innocent.
I already knew this, which is why I went the whole nine yards when that chikan wedged his hand between me and the woman he felt up on the train back in October. Had I not caught him, the woman might have thought it was my hand up her skirt. Ever since then, I no longer stand near women on trains if at all possible. (I don't like men very much, but that's a rant to be left for another day.)