The Yokosuka Naval Base (Japanese: 横須賀基地, Hepburn: Yokosuka Kichi), also simply known as the JMSDF Yokosuka Naval Base, is a group of ports and land facilities of the Japan Maritime Self-Defense Force (JMSDF), which are scattered in multiple districts of Yokosuka City, Kanagawa Prefecture, and where the , etc. are located. It is not officially called a base, but it is used as a common name. The base sits alongside the United States Fleet Activities Yokosuka.