Sushi originated in Japan. It is raw fish in many variations, the mostly known is the raw fish rolled in rice and seaweed. It is very different than all other cuisines like Indian, Turkish or Austrian. Due to the high pollution of the oceans and the seas with heavy metals like mercury, it is recommended not to consume too much fish. Like described under Food, you can look for restaurants in your area and order for takeaway or delivery, or look for people who will cook for you at your place.