Shikishima (PLH 31)
 The Shikishima PLH-31 is a Shikishima class (PLH) of the Japan Coast Guard. She was built by Ishikawajima-Harima Heavy Industries Tokyo.Planned to guard plutonium transport ships the Shikishima class is the largest and heaviest-equipped patrol vessel of the JCG. With her cruising capacity she can make voyages from Japan to Europe without making any calls.She is the only JCG ship equipped with anti-air radar and Oerlikon 35 mm twin cannons so she has increased anti-air firepower.