Mount Tsukuba is located in Ibaraki Prefecture, about 70 km northeast from Tokyo. The Japanese have revered the mountain since ancient times, as a sacred mountain akin to Mount Fuji. The mountain has a height of 877 meters. Mount Tsukuba, called Tsukuba-san in Japanese, is popular with visitors as anyone can easily climb it. More than 2 million people visit a year. From the old days, it has been believed that a mysterious force dwells in this mountain. In this episode, we present the story of Mount Tsukuba, a sacred mountain rich in mysterious charm.