As a merchant’s house, having such a big formal Buddhist altar, and also housing the private prayer room is exceptional. It is the most important room in the entire house and can be said to be at the core of the spirit of the Sugimoto family for generations who have deeply devoted to Buddhism (Nishi-Honganji temple) from the beginning. There is a transom window with a beautiful carving of lotus flowers which was sent to the family temple Junsho-ji Temple(open only on special days in autumn), by the Confucian scholar Edo period Hayashirazan in 1610. When the current Buddist room was reconstructed in 1870, it was awarded to our family from Junsho-ji Temple. Under this Buddhist altar room,there is a basement made of stone. The experiences of the Great Fire in 1864 have led to the wisdom of disaster prevention to protect the precious things by setting up a basement room under the Buddhist altar room.