Akakabuto is a very unique bear, even so that humans were not sure about his species. One of his most distinctive traits (the one that he was named after) was the red mane running down his back. Otherwise, he is brown and originally sized similar to the brown bears of Hokkaido. His right eye is blind, making it easier to tell him apart from his offspring. Akakabuto is originally around 2-4 meters in height, but eventually grew into incredibly 12 meters. In the end, his weight was about 5,000 kg.