From the online Museum of Unusual Specimens, this "exhibit" can be found in Room 9. These creatures are all imaginary, made from resin and other materials.
Room 1 is devoted to beasts and dragons. Room 3 includes demons. Room 5 is reptilian, etc.
Though in Japanese, the creations are worth struggling through the navigation. Multiple links included here to help the process.
ROOM 1
ROOM 2
ROOM 3
ROOM 4
ROOM 5
ROOM 6
ROOM 7
ROOM 8
ROOM 9
ROOM 10