A traditional fish paste product made from white fish, often mixed with yamaimo(Japanese yam) and believed to date from the Edo period. It is white with a soft, spongy texture and mild taste. It is one of the most common ingredients in o-den, a popular winter dish which consists of various ingredients stewed in a light dashi broth. It can also be fried with butter. Hanpen is low in fat, high in protein and a rich source of calcium.