Naval Air Facility Atsugi


Naval Air Facility Atsugi (厚木海軍飛行場 Atsugi Kaigun-hikōjō) is a naval air base located in the cities of Yamato and Ayase in Kanagawa Prefecture. The 1,249 acres of Naval Air Facility Atsugi is in the heart of the Kanto Plain on Honshu, the main island of Japan.

Aircraft and Squadrons:

The following Fleet Air Force units of the Japanese Maritime Self Defence Force units are based at NAF Atsugi:

  • Fleet Air Wing 4, Air Patrol Squadron 3 flying the Lockheed P-3C Orion and Kawasaki P-1.
  • Air Transport Squadron 61 operating the Lockheed C-130R Hercules and the Beechcraft LC-90.
  • Air Development Squadron 51 operating the P-1 & UP-1, P-3C & UP-3C Orion and a mix of SH-60J/K & USH-60K Seahawks.

The Unites States also has a presence at the base, although much less then it previously had.

  • Helicopter Maritime Strike Squadron 77 Saberhawks operating the MH-60R Seahawk.
  • Helicopter Sea Combat Squadron 12 Golden Falcon operating the MH-60S Seahawk.
  • Helicopter Maritime Strike Squadron 51 Warlords operating the Sikorsky MH-60R Seahawk.
ASO Atsugi Base 4 (1 of 1)

Overview of NAS Atsugi from the spotting platform at the end of the runway. Showing the diverse range of types operating from the base.

JASDF Atsugi 26 (1 of 1)

A mix of P-1, P-3 C-130, LC-90 SH-60 and C-40s were parked up on our arrival.


The Imperial Japanese Navy constructed the base in 1938 to house the 302nd Kokutai, one of the Navy’s most formidable fighter squadrons during World War II. Aircraft based at Atsugi shot down more than 300 American bombers during the fire bombings of 1945. After Japan’s surrender, many of Atsugi’s pilots refused to follow Hirohito’s order to lay down their arms, and took to the skies to drop leaflets on Tokyo and Yokohama urging locals to resist the Americans. Eventually, these pilots gave up and left Atsugi.

After the end of hostilities the United States took up residence at the base. The USAAF 3d Bombardment Group moved in on the  8 September, before they were replaced by the USAAF 49th Fighter Group on 15 September which handled the initial clean up of the heavily damaged airfield along with the 1539th Army Air Forces Base Unit to provide station facilities. Flight operations were restored by October which allowed the P-61 Black Widow-equipped 418th Night Fighter Squadron to operate from the airfield to provide air defence over the area, along with the P-38 Lightnings of the 49th Fighter Group. 

In later years the base became host to many types including, the Lockheed U-2 spy plane, United States Marine Corps operated F8U-2 Crusader, McDonnell Douglas F-4 Phantom II, Boeing F/A-18E Super Hornets operated by VFA-115 and VFA-195 and the EA-18G Growler-equipped VAQ-141. Most American squadrons have since departed the base leaving just three squadrons being hosted today.

One of the highlights from my trip was the chance to see the latest in Japanese Anti-Submarine and patrol aircraft the Kawasaki P-1. We arrived early in the morning on a low cloud base day. The weather was a lot colder then the previous visits. However the weather didn’t stop the action in the skies above. A full day at the base where there is some of the best spotting facilities I have ever seen. A park with mounds and bridges to elevate you to look into the base, toilets, and shops all within walking distance to the base made it a fantastic day out. I highly recommend the Lawson’s fried chicken and the yakisoba noddles for lunch!

Now its onto the photos, and the day produced some great arrivals and departures as it went on. The weather got better and so did the light of course.

Sikorsky SH-60J

JASDF Atsugi 1 (1 of 1)

JMSDF USH-60K  51-8901 of Air Development Squadron 51.

JASDF Atsugi 20 (1 of 1)

JASDF Atsugi 2 (1 of 1)

JMSDF SH-60J, 51-8263

JASDF Atsugi 21 (1 of 1)

JMSDF SH-60J, 51-8263

Lockheed P-3C Orion

Kawasaki Heavy Industries Ltd, based in Kobe, Japan, manufactured the P-3C aircraft in Japan under licensed agreement. Kawasaki is the prime contractor to the Japan Maritime Self-Defence Force (JMSDF) for the supply of 110 P-3C aircraft. Ishikawajima-Harima Heavy Industries (IHI), based in Tokyo, manufactured the engines.

As a manufacturer of the P-3C Orion, Kawasaki was allowed to authorise changes and improvements to the design up to a certain level. Major changes however had to be reviewed and authorised by Lockheed and the US Navy before implementation to the design. Originally Kawasaki produced P-3C-II½ Orions from the 70th aircraft and up  they followed the Americans and switched to the P-3C-III.

During 1990 Kawasaki unveiled plans for a series of special variants of the Orion for service with the JMSDF. These included an Electronic Warfare trainer, an oceanographic research version, a systems test and evaluation aircraft and a transport variant. Kawasaki delivered its final P-3C-III to the JMSDF on 17 November 1997. The very last Orion built in the world, Kawasaki’s UP-3D (9163) was delivered to the JMSDF on 1 February 2000. This marked the end of 38 years of continuous P-3 production.

JASDF Atsugi 3 (1 of 1)

P-3C Orion, 51-5088 prepares to depart.

Beechcraft LC-90

JASDF Atsugi 22 (1 of 1)

The Japan Maritime Self-Defense Force has operated a total of 40 C90 and C90A King Airs, since deliveries started in 1973. These have been given various designations by the JMSDF and consist of 34 TC-90 trainers, five LC-90 transports and a single UC-90 which is configured for photographic aerial survey. The TC-90s and the UC-90 comprise the 202nd Naval Air Training Squadron (JMSDF) based at Tokushima Air Base, while the LC-90s are attached to various Lockheed P-3 Kokutai (Squadrons) and a Air Transport Squadron 61 as liaison aircraft.

During the visit LC-90, 61-9302 was very active through out the day.

JASDF Atsugi 23 (1 of 1)

Kawasaki P-1

JASDF Atsugi 24 (1 of 1)

The P-1 has been actively marketed to other countries including, New Zealand which ordered the Boeing P-8 instead.

The Kawasaki P-1 is a purpose-built maritime patrol aircraft  powered by four IHI F7-10 turbofan engines. The four-engine low-wing loading design adopted for the P-1 results in a flight profile with better manoeuvrability and stability at low-speed and low-altitude flight.

JASDF Atsugi 25 (1 of 1)

Four podded IHI F7-10 turbofan engines sit underneath the low-set wings.

The P-1 is equipped with many newly developed technologies and features, particularly in terms of its avionics and missions systems. One such key feature is the use of a fly-by-light flight control system. This has the effect of decreasing electro-magnetic disturbances to the sensors in comparison to more common fly-by-wire control systems. The P-1 is the first production aircraft in the world to be equipped with such a flight control system. Various on board systems are provided by Honeywell, who is the largest non-Japanese supplier to the project, such as the auxiliary power unit, environmental and pressurisation control systems, ram air turbine, sonobuoy dispensers and elements of the avionics.

JASDF Atsugi 4 (1 of 1)

5514 taxies out for its mission.

JASDF Atsugi 19 (1 of 1)

JASDF Atsugi 27 (1 of 1)

The P-1 is equipped with various sensors to enable the aircraft to perform its primary purpose of detecting submarines and surface vessels; these include the Toshiba HPS-106 active electronically scanned array (AESA) radar which uses a total of four antennas to provide 360 degree coverage, and Infrared/Light detection systems for surface detection. The P-1 is also furnished with a CAE Inc.-built magnetic anomaly detector (MAD) embedded into the aircraft’s tail, along with deployable sonobuoys, which is used for the detection of submerged submarines. Sophisticated acoustic systems are also used for this purpose. The P-1 has an artificial intelligence (AI) system to assist TACCO operations. This is similar to the system in the SH-60K, this advanced combat direction system directs the TACCO operator to the optimal flight course to attack a submarine.

Next P-1 to arrive back at base was 5502.

JASDF Atsugi 13 (1 of 1)

5502 on finals.

JASDF Atsugi 12 (1 of 1)

The array of sensors, antenna and the large flaps are evident in this view.

ASO Atsugi Base 5 (1 of 1)

Two P-1s which didn’t fly during the day were 5511 and 5513.

A welcome visitor was the next in the pattern. Various United States military aircraft still frequent the base. Today would be no exception. With both a US Navy Boeing C-40A Clipper and US Marines Lockheed KC-130J Hercules dropping in. 

Boeing C-40A Clipper

JASDF Atugi C-40 (1 of 1)

US Navy Boeing C-40A Clipper 16-8980

JASDF Atsugi 18 (1 of 1)

US Navy Boeing C-40A Clipper 16-8980

JASDF Atsugi 30 (1 of 1)

Again JMSDF SH-60J, 51-8263 was on station.

Yet another welcome visitor was a US Marines operated type. The Lockheed KC-130J Hercules.

Lockheed KC-130J Hercules

JASDF Atsugi 17 (1 of 1)

US Marine Corps KC-130J, 167109

JASDF Atsugi 16 (1 of 1)

Operated by Marine Aerial Refueling Transport Squadron 152 (VMGR-152) provides aerial refuelling service to support Fleet Marine Force (FMF) air operations. It provides assault air transport of personnel, equipment, and supplies. The squadron, known as the “Sumos”, VMGR-152 is stationed at Marine Corps Air Station Iwakuni, Japan and is part of Marine Aircraft Group 12 (MAG-12) and the 1st Marine Aircraft Wing (1st MAW).

The KC-130J provides the Marines with tactical aerial refuelling, assault-support, close air support, and multi-sensor imagery reconnaissance, day or night, under all weather conditions. It is the only long-range, fixed-wing assault support capability available to the Marine Corps.

Other improvements include a Rolls Royce AE2100 propulsion system, a Dowty R391 advanced-technology, six-bladed propeller system, and a 250-knot cargo ramp and door. All of the active component KC-130T aircraft have been replaced with KC-130Js.

Then it was time for  some more P-1 actions as aircraft 5508 and 5514 returned to base. All the while SAR UH-60J flew the pattern on duty.

JASDF Atsugi 9 (1 of 1)

P-1 5508 arrives back at Atsugi

JASDF Atsugi 33 (1 of 1)

JMSDF SH-60J, 51-8263

JASDF Atsugi 14 (1 of 1)

Kawasaki P-1, 5514

Aircraft 5514 then proceeded to preform a series of touch and goes at the base.

JASDF Atsugi 10 (1 of 1)

Kawasaki P-1, 5514

Up and down all day on training missions was the LC-90.

JASDF Atsugi 15 (1 of 1)

Beechcraft LC-90, 61-9302.

Having only seen one of the P-3C Orions depart I was starting to lose hope we would see one in the air on approach. Thankfully the JMSDF didn’t disappoint. Lockheed P-3C 51-5088 was soon on the approach. The JMSDF operate several variants of the Orion, which includes sixty eight of the Maritime patrol P-3C, four of ELINT EP-3C, five of the Optical reconnaissance OP-3C, one Equipment test UP-3C airframe and finally three Electronic warfare trainer UP-3D . Since 2009 the Japan Maritime Self-Defense Force has deployed P-3s to Djibouti for anti-piracy patrols.

JASDF Atsugi 6 (1 of 1)

Lockheed P-3C 51-5088 one of several built by Kawasaki.

And yet again another P-1 was on the approach, it looked as through we would get the entire fleet in the air at this stage.

JASDF Atsugi 11 (1 of 1)

As one landed another prepared to depart this time another Lockheed P-3C Orion was on taxi for departure.

JASDF Atsugi 34 (1 of 1)

Nothing sounds as sweet as T-56 engines in stereo.

ASO Atsugi Base 2 (1 of 1)

As the Orion taxies out the locally stationed Lockheed stalemate the C-130 is seen in the background

JASDF Atsugi 35 (1 of 1)

JASDF Atsugi 7 (1 of 1)

As the sun set on a fantastic day of flying P-1, 5505 conducted several touch and goes.

As a spotting base Atsugi really is one of the best set ups I have ever seen and I really do recommend a visit to this base.

See Part One of Dave’s series of Japanese Air Base visits, JASDF Iruma, HERE.

See the second instalment, JASDF Hammamatsu Airshow, HERE