In other news ( http://www.japanrailpass.net/eng/en008.html ): "Use of a JAPAN RAIL PASS is strictly limited to the signer (hereafter "you") only." Surely an outrageous clause like this one can only be the product of big corporations and corrupt politicians. What about "the right to travel"?
It'd be unreasonable if there was a specific law on the books in Japan that says if you loan out your rail pass you're branded a criminal (which in the case of Japan means you're deported for life) and get jail time, instead of them just taking it away from you and saying "you broke the terms, no more rail pass for you".