Itadaki Kazuya is a large Deadman in Deadman Wonderland. He is known for eating a lot. His nickname, "Masu" (or "Mass"), is a pun when combined with his given name; the word いただきます (itadakimasu) is the traditional Japanese expression used when beginning a meal which is the equivalent to saying "let's eat" or "dig in." He has been shown to have a very large appetite, consuming masses of food over a short time.