Mashū-class replenishment ship

The Mashū class is a series of replenishment oilers of the Japan Maritime Self-Defense Force. They were built from 2002 to 2004. The ships have the hull designator AOE.

JS Mashū underway in the Persian Gulf on 22 September 2006.
Class overview
Builders	Hitachi Shipbuilding Corporation, Maizuru Ishikawajima-Harima Heavy Industries, Tokyo
Operators	Japan Maritime Self-Defense Force
Preceded by	Towada class
Planned	2
Completed	2
Active	2
General characteristics
Type	Fast combat support ship
Displacement	13,500 tonnes standard 25,000 tonnes full load
Length	221 m (725 ft)
Beam	27.0 m (88.6 ft)
Draught	8.0 m (26.2 ft)
Propulsion	2 × Kawasaki Rolls-Royce Spey SM1C gas turbines 40,000 shp (29,828 kW) each 2 × shafts
Speed	24 knots (44 km/h; 28 mph)
Range	9,500 nmi (17,594 km; 10,932 mi) at 20 knots (37 km/h; 23 mph)
Complement	150
Sensors and processing systems	OPS-28 Surface Search RDF OPS-20 Navigation RDF
Electronic warfare & decoys	NOLR-8 RDF Interceptor Mk.137 decoy launchers
Armament	2 × Phalanx CIWS
Aircraft carried	1 × helicopter
Aviation facilities	Helicopter deck and enclosed hangar

The Mashū class was designed as an enlarged, improved version of the Towada-class fast combat support ships. The vessels are capable of mounting 2 Phalanx CIWS by design. They are in commission from 2004 onwards.

List of ships

Name	Number	Laid down	Launched	Completed	Commissioned	Homeport	Status
Mashū (ましゅう)	AOE-425	21 January 2002	5 February 2003	15 March 2004	3 April 2006	Maizuru	Active
Ōmi (おうみ)	AOE-426	7 February 2003	19 February 2004	3 March 2005	3 April 2006	Yokosuka	Active

Gallery

• 
  JS Mashū in Maizuru Naval Base on 13 April 2019.
• 
  JS Ōmi underway in January 2017.