In the San-no-maru area of Himeji Castle, there used to be a palace called Musashino-goten. This palace was built in 1617 by Honda Tadamasa, who moved from Ise Kuwana to Himeji, for his son Tadatoki and his wife Sen Hime, a newlywed couple. The name “Musashino-goten” is said to have come from the paintings of Japanese pampas grass on the sliding doors to express the atmosphere of Musashino in Edo, where Sen Hime had lived for many years. Today, a neat stone wall remains on the site of the former Musashino-goten as part of the garden. These stone walls were piled using the most advanced technology of the time as garden stones to decorate the garden, and have an elegant appearance unparalleled anywhere else in Himeji Castle. Excavations have confirmed that the portion visible above the present site is only a portion of the entire structure, and that the original ground surface was 1 to 2 meters lower than the present surface. The Musashino Palace was built as a place for Sen Hime and Tadatoki to live as newlyweds, and the remains of the garden culture and architectural techniques of the time can be seen on the site.