First, part of the dinosaur's tail was discovered in a joint excavation by the Hobetsu Museum and the Hokkaido University Museum in 2013.
Scientists called the dinosaur "Kamuysaurus japonicus". The name comes from "kamuy", the word for diet in Ainu, the language of the indigenous people of northern Japan; "saurus" meaning reptile in Latin; and "japonicus" for Japan.
What could a dinosaur look like when it was alive
The dinosaur discovered is most likely an adult, according to a histological study by a research team.
The frontal bone of his skull has a long front anterior platform for the nasofrontal surface, which means that the dinosaur had what some might call a duck.
The team discovered this dinosaur with three characteristics that are not shared with other biologically similar dinosaurs: the low position of the cranial bone, the short ascending process of the jaw bone, and the anterior inclination of the nerve spines of the sixth to twelfth dorsal vertebra.
What they learned from this discovery
The last common ancestors of the dinosaurs in the Edmontosaur clan were widespread in both Asia and North America. At the time, they were connected to present-day Alaska, allowing them to travel back and forth between the two continents.
Group studies also suggest that dinosaur ancestors preferred to inhabit areas near the ocean. The mid-shoreline may have played an important role in the diversification of Hadrosaurus in its evolution.