Taiwanese mullet roe drying in open air. The roe is deveined, and progressively pressed, dehydrated and salted until the desired firmness or texture is achieved. Mullet roe is considered a delicacy in Taiwan as well as in Japan.
Karasumi (Japanese: カラスミ (唐墨,鱲子), Romaji: karasumi; Chinese: 烏魚子; pinyin: wūyúzi; Pe̍h-ōe-jī: o͘-hî-chí) is a food product made by salting mullet roe and drying it by the sunlight. A theory suggests that it got its name from its resemblance to a block of sumi (inkstick) imported from China (Kara) and used in shodo. Karasumi is a high priced delicacy and it is eaten while drinking sake.