Shigeru Mizuki is the creator of the classic manga GeGeGe No Kitaro, about a very strange little boy who was part of both the human and Yokai world. Yokai are traditional Japanese forest spirits, kinda like morally ambivalent demons and spirits, and Mizuki-san did tons to catalogue and perhaps even invent them in his manga. Now according to Japananator, Mizuki has created a new field guide for these demons called Yokai Daizukai.
I don’t think I saw this in Japan, else I would’ve bought it. But wow, it’s AWESOME. Hopefully it’s a candidate for a North American release. Lots more pictures at: http://www.japanator.com/ever-wanted-to-dissect-a-japanese-folk-monster–11736.phtml