This fourth-floor museum, which you can tour in about 20 minutes, is a collection of more than 600 instruments, displayed on a rotating basis and including traditional Japanese drums as well as a variety of drums from all over the world. With the exception of some of the rare, older pieces (distinguished by a red marking), many of the 200 or so drums always on display can be touched and played, making this a good spot for children. There are also videos of drumming from Japan and around the world. On the ground floor is a shop specializing in Japanese percussion instruments and items used in Japanese festivals, including decorative Japanese drums, lion heads for the lion dance, Japanese flutes, and masks.