Pidan, also known as Century eggs, preserved egg, hundred-year egg, thousand-year edd, black egg, etc. is one of Chinese delicacy, made by preserving duck, chickin or quail eggs in a mixture of clay, ash salt, quicklime and rice hulls or several weeks to several months.
Most of (if not all) Chinese restaurants serve Pidan. Therefore, being a Chinese restaurant, Pankichi-Ken keeps some Pidans in stock, too.
However, Pankichi-Ken's signature dish being Dumpling made by a glorious dumpling master Chef, Gyoza-otoko, Pidan sales at Pankichi-Ken is almost nil.
Despite of this fact, somehow (maybe because Pankichi is fond of Pidans?), Pidans are regularly purchased by Pankichi-Ken and now Pidan population at Pankichi-Ken is quite high...
They are very laid back and enjoy their life a lot. They also love good wine.
It is said that there is an Island called "Pidan Island" somewhere in the ocean. A story of the Island is to be told sometime near future..