Donohamu (どのハムさま) is a hamster who appears in the Hamuchanzu de Gozaimachu! manga series. He carries the title of both "Dono/Tono" (meaning "lord" or "master", in a Feudalistic way), and "Sama" (of a higher rank than others). Despite his high titles and popularity, he has a laid-back attitude, and works at a leisurely pace.
Donohamu did not have any major roles in any Hamtaro media; outside of appearing on a few trading cards, and having small cameos in Gozaimachu! Vol.2 and Vol.3. There is also an XLC Co. figure of him.