Prove that traveling abroad in Archaic Japan wasn't sometimes extremely risky and always dirty. You can't.
[Source: Mason, R.H.P. and J.G. Caiger. A History of Japan. North Clarenden, VT: Tuttle Publishing, 1997.]
P.S. Just how many initials do authors need to have?
P.P.S. (For Chantyzzle: It may not be January 8th yet in America, but it definitely is here in Japan. To be sure.)