See inside Godzilla, Gamera, and a couple of other movie monsters in poster form. If I could only read Japanese to find out where their weak spots are, then I, too, could save the world! http://www.kontraband.com/pics/19684/The-Anatomy-Of-Japanese-Monsters/?gpage=1#show -via Digg
Upodate: These are from the book An Anatomical Guide to Monsters by Shoji Otomo with illustrations by Shogo Endo, from 1967. More information can be found at Pink Tentacle, including partial translations. -Thanks, algomeysa!