Kamuysaurus A recently announced (September 2019), Late Cretaceous Japanese hadrosaur Kamuysaurus discovered near the town of Mukawa, Hokkaido in Japan. Living around 72 - 70 million years ago the herbivorous animal grew to around 8 m in length. Kamuysaurus may have had a short crest on its head. The fossil is perhaps the most complete discovered in Japan.