The Japan Coast Guard Museum Yokohama (海上保安資料館 横浜館, Kaijō hoan shiryōkan Yokohama-kan) is a museum in Naka-ku, Yokohama, Kanagawa Prefecture, Japan, dedicated to maritime security and the Japan Coast Guard.

It opened on 10 December 2004.

[1] The centrepiece of the museum is a North Korean spy vessel, which was sunk by the Japan Coast Guard in December 2001 following a firefight in the East China Sea near the island of Amami-Ōshima.

(See Battle of Amami-Ōshima.)