Japan Coast Guard

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Japan Coast Guard
Kaijō Hoan-chō
Abbreviation JCG
Japan Coast Guard racing stripe.svg
Ensign of the Japanese Coast Guard.svg
Japan Coast Guard ensign
Agency overview
Formed 1948 (As Maritime Safety Agency)
April 2000 (As Japan Coast Guard)
Preceding agency Maritime Safety Agency
Employees 13,744[1]
Annual budget 210,601,000,000 yen[1]
Legal personality Governmental: Government agency
Jurisdictional structure
National agency
(Operations jurisdiction)
Legal jurisdiction Japanese Maritime Zone
Primary governing body Government of Japan
Secondary governing body Ministry of Land, Infrastructure, Transport and Tourism
General nature
Operational structure
Headquarters Tokyo, Japan
Agency executive Satoshi Nakajima[page needed]
  • Official Site (in Japanese)
  • Official Site (in English)
Official Websites in Japanese and English

The Japan Coast Guard (海上保安庁, Kaijō Hoan-chō, literally "maritime security agency"), formerly the Maritime Safety Agency, is the Japanese coast guard. Comprising about 12,000 personnel, it is under the oversight of the Ministry of Land, Infrastructure, Transport and Tourism, and is responsible for the protection of the coastline of Japan. It was founded in 1948.


The mission of the JCG is to ensure security and safety at sea as below:

As stipulated in Article 25 of the Japan Coast Guard Law, the JCG is not a military but a civilian organization. In the case of emergency situation, the JCG may be incorporated under the direction of the Minister of Defense as stipulated in Article 80 of the Self Defense Force Law, but they are to be still civilian police force as the Ministry of Defence Police of the United Kingdom.


National Headquarters

The Japan Coast Guard is led by a Commandant and two Vice Commandants. Lower ranking officers include the director general, directors and inspector generals.

Organization (as of April 1, 2009)

  • Commandant
    • Vice Commandant
    • Vice Commandant for Operations
  • Administrative Inspector General
  • Administration Department
  • Coast Guard Research Center
  • Equipment and Technology Department
  • Guard and Rescue Department
  • Hydrographic and Oceanographic Department
  • Maritime Traffic Department
  • Coast Guard Academy (Kure)
  • Coast Guard School (Maizuru)
  • Moji Branch school (Kitakyushu)
  • Miyagi Branch school (Iwanuma)

The Japan Coast Guard Academy is a 4-year-training institution, located in Kure, Hiroshima prefecture, established within the Coast Guard for the purpose of training students to become officers. Graduates are given a bachelor's degree upon graduation. About 40 cadets graduate from the academy each year.

Main building of the Ministry of Land, Infrastructure, Transport and Tourism in Kasumigaseki, under which the Japan Coast Guard operates, and where it is headquartered

Operational units

Regional organization

A map of the division of jurisdiction between the 11 JCG regions

The JCG has divided the nation into eleven regions to facilitate its coast guard operations. Each region maintains a Regional Coast Guard Headquarters, under which there are various Coast Guard Offices, Coast Guard Stations, Air Stations, Hydrographic Observatory, and Traffic Advisory Service Centers.

Special units

Boarding team of the JCG during exercise.

The JCG maintains three national-level elite units:

Special Rescue Team (SRT) (特殊救難隊, Tokushu-kyūnan-tai).
Rescue swimmers and public safety diving team. Regional counterparts are Sensui-shi (潜水士).[2]
National Strike Team (NST) (機動防除隊, Kidou-boujo-tai)
Offshore oil spill and chemical hazard response team. The Japanese counterpart of the National Strike Force (NSF) of the USCG.[2]
Special Security Team (SST) (特殊警備隊, Tokushu-keibi-tai)
Counter-terrorism special forces team. Regional counterparts are Tokubetsu-keibi-tai (特別警備隊).[2]



Immediately after its creation, the MSA operated the second-hand ship of the former Japanese Navy, but only small and slow vessels were allowed to use.[3] From FY1949 the construction of new ships began. Because GHQ instructed to model a ship of the USCG, the 700-ton class PL (ja) was based on Cactus-class buoy tenders, the 450-ton class PM (ja) was based on Thetis-class patrol boat, the 270-ton class PS (ja) was based on Active-class patrol boat, and the 23-meter class PC (ja) was 75-feet patrol boat as a model. However, these ships did not comply with the actual work of MSA and the sea condition around Japan.[4]

As a result, when the Treaty of San Francisco came into force, MSA's own patrol ship's design work began. The PL type patrol vessels increased in size to 900-ton class (ja), PS type patrol vessels differentiated into 350-ton class (ja) and 130-ton class (ja). Later, the 350-ton class PSs were reclassified as PM type.[5]

In late 1970s, it was clear that the new international rules on exclusive economic zone would need a considerable increase in the size of the Maritime Safety Agency fleets. To cope with this dramatic increase in workload, 1,000-ton class PLs, 500-ton class PMs (ja) and 30-meter class PCs (ja) were built in large quantities. And JMSA also began the shipping operation of air-sea rescue helicopters with PLHs.[6]

Since the 1980s, criminal ships had advanced into the ocean and speeding up, and North Korean armed trawlers have come to appear. For this reason, in addition to designing 180-ton class PSs (ja) that combined both ocean-going capability and high-speed performance, speeding up of PL and PM type patrol vessels have also been aimed. Also equipped with remote control and automatic tracking function of machine cannon, precise shooting became possible.[7]


The JCG operates 455 watercraft, these include the following:

  • Patrol vessels: 121
  • Patrol craft: 234
  • Special guard and rescue craft: 63
  • Hydrographic survey vessels: 13
  • Aids to navigation evaluation vessels: 1
  • Buoy tenders: 2
  • Aids to navigation tenders: 18
  • Training boats: 3


The JCG operates 74 aircraft, these include:

  • Fixed Wing: 27
  • Helicopters: 46


a "Onebox Car" using as a Patrol Car of Japan Coast Guard in Kagoshima.

The JCG does not have any Emergency vehicle but civilian vans for transporting goods and personnel.[8]


As described above, the JCG is not a military but a civilian organization, so the rules on the use of weapons are based on those of police officers, not self-defense officers.

Vessel-mounted weapons

Because the Allied countries wanted to maintain disarmament of Japan, the armaments of the MSA was restricted to only small arms in the earliest days. However, following the outbreak of the Korean War, the need to strengthen the security capability became necessary, and since 1954, the installation of the guns on the ships was started.[7]

Initially it was supposed to carry Mark 22 3"/50 caliber gun for large vessels (PL type), Bofors 40 mm L/60 guns for medium and small size ships (PM and PS type), and Oerlikon 20 mm L/70 guns in particular for small patrol boats (ARB type and auxiliary submarine chasers). Actually, however, the number of 40 mm guns was insufficient, and many of the small boats had 20 mm guns installed.[7]

From the 1970s, substitution of these old guns began. The 3-inch guns was retired by 1979, as the aging was progressing. Also from the FY1978 ships a Oerlikon 35 mm L/90 gun was used instead of a Bofors 40 mm L/60 gun, and from the FY1979 ships, JM61-M 20 mm rotary cannons were installed instead of Oerlikon 20 mm guns.[7]

Only a few of the 35 mm guns had a limited remote control function, most of these guns were manually controlled. Then, full-scale remote operation and automatic tracking function were introduced in the guns mounted on the Shikishima built in 1989. Especially 20 mm gun was added as standard equipment as JM61-RFS, and it was mounted on many patrol vessels. And in order to counter with the heavily armed North Korean naval trawlers, the PLs were equipped with 40 mm L/70 gun or 30 mm chain gun remotely controlled with an optical director.[7]

Personal weapons

In the earliest days, MSA officers issued Nambu Type 14 pistols and M1 rifles. Since the 1960s, the Nambu pistols were replaced by New Nambu M60 revolvers, and some security units equip Smith & Wesson Model 5906TSW pistols.[7]

Since the late 1960s, the M1 rifle were replaced by Howa Type 64 rifles, and from 1990, Howa Type 89 rifles. In addition to these automatic rifles, SST is equipped with Heckler & Koch MP5A5/SD6 submachine guns. Howa M1500 is adopted as a sniper gun, and the SST also has anti-materiel rifles manufactured by the McMillan Firearms.[7]


In the Empire of Japan, coast guard operations were mandated for the Imperial Japanese Navy. But the Navy was dissolved with the surrender of Japan, and the ability of maintaining maritime order was declined seriously. Dense trade and smuggling had increased dramatically, even pirates had come to appear. Consultation between the Japanese government who wanted to restore public security capacity as soon as possible and the Allied countries wanting to maintain disarmament of Japan faced difficulties, but in 1946, an "Illegal Immigration Control Headquarters" was established in the Ministry of Transport, as cholera was transmitted to Kyushu by smugglers from the Korean Peninsula and was concerned to cause severe infection explosion.[9][10]

Meanwhile, the GHQ/SCAP also recognized the deficiencies of the Japanese coast guard system, and in March 1946, USCG Captain Frank M. Meals was invited to consider the situation. Captain Meals suggested the establishment of a comprehensive coast guard organization based on the USCG. In response to this, MSA was established as an external station of the Ministry of Transportation in 1948.[10] Its English name was changed to Japan Coast Guard in April 2000.[11]

Notable events

Minesweeping operations
Immediately after the end of the war, a large amount of mines laid by the US military were left in the waters around Japan, and the processing became an important mission of the MSA. For this mission, minesweepers of the former IJN were incorporated into the MSA, and later, transferred to the Safety Security Force, ancestor of the Japan Maritime Self-Defense Force.[12]
In addition to activities in Japan's waters, in 1950, two flotillas minesweepers were sent to the Korean Peninsula under the United Nations flag during the Korean War.[13]
Spy Ship Incident in the Southwest Sea of Kyūshū
On December 22, 2001, JCG ships intercepted a Chinese-flagged vessel believed to be North Korean in origin, in the Japanese Exclusive Economic Zone between Kyushu and China. When the vessel failed to respond, she was fired upon by the JCG and an exchange of gunfire resulted. The unidentified vessel sank in the Chinese EEZ with all hands.[14] The ship, later salvaged by the JCG, was found to be carrying weapons and spy equipment.[15] The wreck and its contents were put on display at the Japanese Coast Guard Museum at Yokohama.[16]

See also


  1. ^ a b http://www.kaiho.mlit.go.jp/e/english.pdf
  2. ^ a b c Yoneda 2016.
  3. ^ Asanaga & Ōtsuka 1995, pp. 47-51.
  4. ^ Asanaga & Ōtsuka 1995, pp. 51-60.
  5. ^ Asanaga & Ōtsuka 1995, pp. 63-91.
  6. ^ Asanaga & Ōtsuka 1995, pp. 120-143.
  7. ^ a b c d e f g Nakanomyo 2015.
  8. ^ Komine 2005.
  9. ^ Maritime Safety Agency 1979, pp. 5-6.
  10. ^ a b Hasegawa 2010.
  11. ^ New Fighting Power![permanent dead link] Retrieved on April 25, 2008.
  12. ^ Maritime Safety Agency 1979, pp. 6-28.
  13. ^ Maritime Safety Agency 1979, pp. 22-23.
  14. ^ 国境を守る海上保安庁. (in Japanese)
  15. ^ 北朝鮮 工作船. (in Japanese)
  16. ^ 海上保安資料館 横浜館-Japan Coast Guard Museum YOKOHAMA-. (in Japanese)
  17. ^ Advanced Land Observing Satellite "DAICHI" (ALOS) (JAXA webpage)


  • Asanaga, Youichirou; Ōtsuka, Yukitaka (1995). Japan Maritime Safety Agency - their vessels and aviation. Seizando-shoten publishing co.,ltd. ISBN 4-425-77041-2. 
  • Maritime Safety Agency (1979). 30 years history of Japan Coast Guard. Maritime Safety Agency Foundation. ASIN B000J8HCXQ. 
  • Komine, Takao (2005). SST - the Japan Coast Guard Special Forces. Namiki Shobo. ISBN 4-89063-193-3. 


  • Hasegawa, Hiroyasu (2010). "The Differnce of Speculation in Japan-U.S.Government Around Establishment of the Japan Coast Guard" (PDF). Crisis & risk management review. Crisis & Risk Management Society of Japan (18): 11–20. 
  • Nakanomyo, Masami (October 2015). "History of shipboard guns on JCG's patrol vessels". Ships of the World. Kaijin-sha (825): 168–173. 
  • Miyake, Norio (November 2009). "Japan Coast Guard: Past, present, and future". Ships of the World. Kaijin-sha (714): 97–105. 
  • Yoneda, Kenji (July 2016). "JCG's special teams facing a new phase". Ships of the World. Kaijin-sha (840): 152–157. 

External links

  • Official Site (in Japanese)
  • Official site (in English)
  • JCG Academy Official Site (in Japanese)
  • Details of vessels on Thomasphoto (in Japanese)
  • Details of vessels on VSPG (in Japanese)

Coordinates: 35°40′33″N 139°45′00″E / 35.67583°N 139.75000°E / 35.67583; 139.75000

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