Perilla frutescens var. crispa, also known by its Japanese name shiso, is a cultigen of Perilla frutescens, an herb in the mint family Lamiaceae. It is native to the mountainous regions of China and India, but is now found worldwide. The plant occurs in several forms, as defined by the characteristics of their leaves, including red, green, bicolor, and ruffled. Shiso is perennial and may be cultivated as an annual in temperate climates. Different parts of the plant are used in East Asian and Southeast Asian cuisine.

Japanese cuisine encompasses the regional and traditional foods of Japan, which have developed through centuries of political, economic, and social changes. The traditional cuisine of Japan is based on rice with miso soup and other dishes with an emphasis on seasonal ingredients. Side dishes often consist of fish, pickled vegetables, and vegetables cooked in broth. Common seafood is often grilled, but it is also sometimes served raw as sashimi or as sushi. Seafood and vegetables are also deep-fried in a light batter, as tempura. Apart from rice, a staple includes noodles, such as soba and udon. Japan also has many simmered dishes, such as fish products in broth called oden, or beef in sukiyaki and nikujaga.