Ōmi (AOE-426) is the second ship of the Mashū-class replenishment ships of the Japanese Maritime Self-Defense Force. She was commissioned on 3 April 2006.^[1][2]

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JS Ōmi in January 2017.
History
Japan
Name	Ōmi (おうみ)
Namesake	Lake Ōmi
Owner	Japan Maritime Self-Defense Force
Builder	Hitachi Shipbuilding Corporation, Maizuru Ishikawajima-Harima Heavy Industries, Tokyo
Laid down	7 February 2003
Launched	19 February 2004
Commissioned	3 April 2006
Homeport	Yokosuka
Identification	Pennant number: AOE-426
Status	Active
General characteristics
Class and type	Mashū-class replenishment ship
Displacement	13,500 tonnes standard
Length	221 m (725 ft 1 in)
Beam	27.0 m (88 ft 7 in)
Draught	8.0 m (26 ft 3 in)
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

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She was laid down on 7 February 2003 and launched on 19 February 2004. Commissioned on 3 April 2006 with the hull number AOE-426.

• JS Ōmi and JS Murasame at Yokosuka on 26 October 2011.
• JS Ōmi at Yokosuka on 26 October 2011.
• JS Ōmi and JS Yūgiri at Yokosuka on 18 May 2015.
• JS Ōmi at Yokosuka on 18 May 2015.
• JS Ōmi along with INS Sahyadri and a Kamorta-class corvette during a Malabar exercise.