Japan has some of the best plastic food displays I have seen. Have you every stood outside the shop looking at the displays thinking you could eat the display?
Most stores buy their plastic foods at specialist makers. Some of the designs can be very intricate and costly.
At Seibu Loft and Tokyu Hands you can buy some simple designs for your own kitchen. Most of these ones on sale here are key ring or mobile phone strap pieces. “moshi moshi, can I talk into your hamburger please”
Do you check out the food displays first before going in the restaurant?