In Asia , Zicai ( ç `` è ) ( in China ) , gim ( in Korea ) and nori ( in Japan ) are sheets of dried Porphyra used in soups or to wrap sushi . In Asia , Noriï 1\/4 æ è '' ï 1\/4 ( in Japan ) , Zicai ( ç `` è ) ( in China ) , and Gim ( in Korea ) are sheets of dried Porphyra used in soups or to wrap sushi .