St Cousair Kuzefuku Authentic Flying Fish Broth 10g x 5 packets The only raw material used in this authentic broth is Nagasaki Prefecture's flying fish. Introducing a new, pure broth made with only Nagasaki Prefecture's raw materials. Most of the broths on the market contain only a very small amount of flying fish. Our original charcoal-grilled method maximizes the flavor of the broth, and the sweetness and deliciousness of the flavor of the flying f are well preserved in the broth.