The black egg, known as “kurotamago” in Japan, has an interesting history and is a unique delicacy found in Hakone, a town located near Mount Fuji.
The methodology behind the black egg begins with the natural hot springs and volcanic activity in the region.
Hakone is known for its geothermal activity, and one of the most famous spots is Owakudani, a volcanic valley. The area is characterized by sulfur vents and bubbling hot springs.
To create black eggs, regular chicken eggs are carefully placed in special baskets and lowered into the hot springs at Owakudani.