Eolipotes japonicus was named by Kimura and Hasegawa (2024) [ZooBank Id: DE9D09AC- 3F26-4C91-9AD3-74FA4B02BFBE]. Its type specimen is TPM7847-1, a partial skull (cranium was found with sev- eral skeletal elements, including tympanic bullae, isolated teeth and fragments of postcranial bones,), and it is a 3D body fossil. Its type locality is Utsunomiya, which is in a Tortonian marine horizon in the Ogane Formation of Japan. It is the type species of Eolipotes.