Although it was originally a Shingon Sect training hall called Myofuku-an, in 1297, it was converted to Nichiren Sect after Nichiro Shonin, one of Nichiren’s six disciples who were asked to be at his deathbed, and Nambu Sanenaga stayed overnight here and taught the Lotus Sutra to the priests before moving on to Mount Shichimen. It was later renamed to Myofuku-ji Temple. Nissho Shonin, 17th head priest of Myofuku-ji Temple, donated Mount Shichimen, which had been managed by Myofuku-ji Temple for generations, to Kuon-ji Temple. Since then, the key of the Shichimen-Daimyojin Deity Hall at Keishin-in Temple has been managed by Myofuku-ji Temple. A newly-appointed Chief Administrator (betto) at Keishin-in Temple is required to first visit Myofuku-ji Temple to get the key before going to Mount Shichimen. Because this custom has been followed for so long, Myofuku-ji Temple is called “Kagitori (key manager) Myofuku-ji.” The current main hall was built in 1854 and enshrines the statue of Koyasu Kishibo-jin (Goddess of Childbirth and Children) made by Nichiro Shonin.