The Japanese version of the hot dog—Black Terra Dog—comes in a black bun.
They use edible bamboo charcoal powder to color the bun, which is over 30 cm long. It is one of the most popular street food in the Akihabara district of Tokyo.
Scientists are working on a use for tea mushrooms other than making kombucha.
Through the efficient production of cellulose, they are developing a method to create food packaging and clothing materials (artificial leather and other textiles) from the “mushroom.”