In general the following boiled in sweetened soy sauce are called Tsukudani: seafood, in particular small fish, clams and other shellfish, seaweed such as kelp etc. and in mountainous areas insects such as locusts etc. (Also, the Tsukudani seen these days that is prepared by boiling ingredients in sweetened soy sauce is said to have been first produced at Asakusabashi in Tokyo by Funasa Co. Ltd).
一般に海産物、とりわけ小魚、アサリなどの貝類、コンブ等の海藻類、山地ではイナゴ等の昆虫類などを醤油・砂糖等で甘辛く煮染めたものをこう呼ぶ（なお、醤油・砂糖等で甘辛く煮染めた、今日で見られるような佃煮を作り始めたのは東京・浅草橋にある「鮒佐」だといわれている）。