Meaning
里芋 (さといも, Sato-imo) is Taro, a Japanese food (plants, tubers).
What is Taro?
Satoimo refers to taro ( Colocasia esculenta ). It was a regional staple before rice became predominant. There is a Kyoto variety known as "shrimp taro" because of its curved shape ( ebi-imo , 海老芋 ). The tuber is often prepared through simmering in dashi and soy sauce. The stalk, zuiki (芋茎), can also be prepared a number of ways, including pickling and drying.