The JMSDF Ōminato Naval Base (大湊基地, Ōminato Kichi) is a Japan Maritime Self-Defense Force naval base with port and military aerodrome (ICAO: RJSO) facilities.

[1] On 9 August 1960, the Self-Defense Forces Ōminato Hospital was opened.

[2] Late of March 2021, with the strengthening of the functions of the Self-Defense Forces Yokosuka Hospital, the Self-Defense Forces Ōminato Hospital would be abolished and reduced to a clinic.

[3] Facilities in Ōminato Naval Base includes: The base is currently home for the JMSDF 25th Squadron equipped with Sikorsky SH-60 Seahawk helicopters configured for the anti-submarine warfare role, and assigned to patrols of the Tsugaru Strait.

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