Hamachi Kama (ハマチのカマ) is the collar / cheek of Hamachi (Yellowtail fish). It is the fattiest and juiciest part of the fish.
It is usually referred to the classic grilled yellowtail collar (カマ塩焼き). You will find this dish on menus throughout Japan.
Hamachi is juicy, the flavor is delicate, rich, and slightly sweet. It is high in omega-3 fatty acids, vitamin A, vitamin D, and calcium.