Akaiwa Formation

The Akaiwa Formation (赤岩層) is an Early Cretaceous (Hauterivian-Barremian) geologic formation in central Honshu, Japan. Indeterminate ornithischian fossils are known from the formation. Fossil ornithopod tracks have been reported from the formation. As well as the turtle Kappachelys

Fossil content
The following fossils have been reported from the formation:
 * Osteichthyes indet. - 'fish scales'
 * Reptiles
 * Turtles
 * Kappachelys okurai
 * Crocodylomorpha indet. - isolated teeth of small crocodiles
 * ?Euornithopoda indet.
 * Neochoristodera indet. - a nearly complete right premaxilla
 * Ornithopoda indet. - isolated teeth of small ornithopods
 * ?Theropoda indet.


 * Ichnofossils
 * Ornithischia indet. - tracks