Ashitaba
Tokyo Metropolitan Government documents ashitaba cultivation and shipping on Izu Oshima.
Tokyo Metropolitan Government: Oshima ashitabaIn the kitchen: Wash, blanch until the stems are tender, and serve beside kyon, or add prepared leaves to soup. Spinach or komatsuna can substitute without implying island origin.
Availability: Confirm the harvest window and current stock with the grower or shop.