These sliced beefs looks yummy?
Actually these are not real but just the samples, which will be displayed at some restaurants to show what kinds of food they will serve to coming guests.
These samples are made of vinyl chloride resin and colored by hand. These are just sample and sometime look more delicious than the real. Such samples are sold at Kappabashi district, near Asakusa, and many travelers from other countries are said to get them as souvenirs.
By the way, some big electric shops amazingly sell USB Flash Drive with the sample of sushi. The mixture of electric goods and sushi seems to be very Japanese, I suppose.