The largest of them is a French fairground organ from 1905 which takes up an entire hall and plays every 30 minutes. The main building also houses a concert hall where classical musicians from around the world perform.

The park outside encloses European style gardens with good views of Mount Fuji across the lake. Walking paths lead among the garden's manicured lawns and winding canal, connecting the museums's restaurant, shops, chapel and rose garden to one another. The Music Forest is run by the Ukai Group, which also operates the Glass Forest, a Venetian glass museum in Hakone.