Sazō Idemitsu, the founder of Idemitsu Kosan, founded Idemitsu Shokai, the predecessor of Idemitsu Kosan. In that area, a museum that exhibits mainly the Idemitsu collection that Sazō collected over the years. It is located in a corner of the retro district of Moji Port, and has a modern but nostalgic look with a striking brick look. The exhibition is mainly Japanese drawings, Chinese and Japanese ceramics, and works with the theme are introduced in five to six exhibitions a year. The "Idemitsu Founding Historical Office", which introduces the trajectory of the life of Sazō Idemitsu, is also attached to the premises. "in the footsteps of Sazō Idemitsu-the practice of" respect for human beings ", he introduces the footsteps of Sazō in seven corners.