The museum houses about 2,000 pieces of cultural assets related to the successive shoguns of the Edo Shogunate, including armor used by Tokugawa Ieyasu in the Battle of Sekigahara and a sword dedicated by Hidetada. Also on display is a valuable Western-style clock (Important Cultural Property) that was presented to Prince Tokugawa Ieyasu by King Felipe III of Spain in 1611 as a thank-you for his rescue at sea.