Hyakkiyagyou Picture Scroll
I managed to find one site related to this scroll in Japanese. Roughly translated from babelfish the scroll is described as.. ' Hundred ogre night traveling picture scrolls ' I'm not sure if these are related to the Yokai group of Japanese spirit/demons. If anyone has more info related to this scroll I'd like to read more about it.
Images found at the Tohoku University Library online gallery.
I found this site thanks to Peacay's tip off to Morbid Anatomy related to the imagery of Japanese anatomical charts. I just started randomly clicking through the pile of Japanese links on that site and fortunately stumbled into this goldmine of weird Japanese beasts.