When an American thinks of tuna, this is what he's thinking about; Albacore. Aside from yellow-fin tuna (which is usually served grilled and as steaks), Albacore is the most popular tuna consumed in the U.S.; from tuna sandwiches to tuna salads. And like Mirugai, Albacore has many names itself. Shiro-maguro, Meiji-Maguro, Abako, or just plain white tuna.
Albacore is typically seared extremely rare then served with momiji oroshi and scallions.
It's meat is very soft and depending on how it's stored, it can have an almost metallic taste, to something comparable to chicken. Of course, the former is the result of poor sanitation procedures, and improper storage.