Puffer Fish (Tetraodontidae), famous of their poison, is really a lethal enjoyment of food. The restaurants that serve puffer fish must obtain the licenses. Therefore, only a limited number of puffer fish specialty restaurants out there. There are many options on the menu: puffer fish sashimi, puffer fish skin, puffer fish soup, etc...As a first-timer, it's a leap of faith for that first bite. A must try if you visit Japan.