Black Restaurant known as Kurayami-gohan (a meal in the darkness) is an irregular event in which the non-profit organization SIEN (a cultural exchange group in Japan since 1997) and Higan-ji (a virtual Buddhist temple created by Japanese monks) cooperate at , a temple in Asakusa. SIEN first introduced the concept of a “blind restaurant,” which has since spread abroad (Blinde Kuh ), and is now known in Japan as “Black Restaurant”.