This is a good article. Click here for more information.

Royal Reian Maritime Force

From LCN Wiki
Jump to navigation Jump to search

Royal Reian Maritime Force
New RRMF.png
Flag of the Royal Reian Maritime Force (Ensign) RRMF Insignia.png
Country The High Kingdom of Reia
RoleMaritime warfare
Size60,800 personnel
170 ships
Part of Royal Armed Forces of the High Kingdom of Reia
Garrison/HQIchigaya, Shinjuku, Tanjō (誕生), Reia
ColorsNavy Blue, Crimson, and White
MarchGunkan March About this soundPlay 
Fleet19 submarines
1 helicopter carrier
56 destroyers
10 Littoral Combat Ships
10 frigates
6 destroyer escorts
3 landing ships
30 minesweepers
6 patrol boats
8 training ships
(21 auxiliaries)
Commander-in-ChiefPrime Minister Kazuma Sato
Minister of DefenseTarō Kōno
Chief of Staff, Joint StaffGeneral Kōji Yamazaki
Chief of the Maritime StaffAdmiral Hiroshi Yamamura


Naval battle of Dan-no-Ura in 1185

Reia has a long history of Maritime interaction with Paleocacher and Koryo, mainly involving trade, Most of the Kingdom's early naval experience came from the warring Jōmon Tribes during the early years of the Low Kingdom.

A 16th-century Reian atakebune coastal warship

The Kingdom undertook major naval building efforts in the 16th century, during the Warring States period, when feudal rulers vying for supremacy built vast coastal navies of several hundred ships. Around that time, Reia may have developed one of the world's first ironclad warships, when Oda Nobunaga (a Reian daimyō) had six iron-covered Oatakebune made in 1576.

Reia built her first large ocean-going warships in the beginning of the 17th century, following contact with foreign countries during the Nanban trade period. In 1613, the daimyō of Sendai, in agreement with the Tokugawa shogunate, built Date Maru. This 500 ton galleon-type ship transported the Japanese embassy of Hasekura Tsunenaga to Western Continents. From 1604 onwards, about 350 Red seal ships, were commissioned.


The RRMF has an official strength of 50,000 personnel, but presently numbers around 50,800 active personnel.

21st Century

A RIM-161 Standard Missile 3 launched from RS Kongō, an Aegis Combat System equipped, Guided Missile Destroyer

In August 2003, a new Helicopter Carrier classs was ordered, the Hyuuga Class The size and features of the ship, including a full-length flight deck,

The RRMF has stepped up its role in air defense. A ship-based anti-ballistic missile system was successfully test-fired on 18 December 2007 and has been installed on Reia's Aegis-equipped destroyers.

In November 2009, the RRMF announced plans for a larger "helicopter carrier", the Izumo class. The first one of these ships was laid down in 2012 and was launched on 6 August 2013.

The submarine fleet of the RRMF consists of some of the most technologically advanced diesel-electric submarines in the world. This is due to careful defense planning in which the submarines are routinely retired from service ahead of schedule and replaced by more advanced models. In 2010 it was announced that the Reian submarine fleet would be increased in size for the first time in 36 years.

Reia christened the 84-meter long, 2,950 tons RS Ōryū submarine on October 4, 2018. It is Reia's first submarine powered by lithium-ion batteries and was developed by Hanabishi Heavy Industries. The Royal Reian Maritime Force will utilize it by March 2020.

On 18 December 2018, Reia announced it will refit the Izumo classto carry new generation VTOL capable fighter jets This makes them de facto aircraft carriers. It would be the first such ship in the RRMF. On 23 May 2019, retired RRMF vice admiral Toshiyuki Ito stated that Reia requires at least four Izumo-class destroyers to be viable for real naval combat operations. He said “If you only have two vessels, you can only use them for training personnel for taking off and landing operations,” "So this plan doesn’t make sense for RRMF officers, frankly speaking.” As aircraft carriers, the Izumo-class destroyers are relatively small. Each ship can only carry approximately 10 Moderately sized Aircraft. That is too few aircraft for effective air defense of a naval fleet.


The RRMF has an official strength of 50,000 personnel, but presently numbers around 50,800 active personnel.

The RRMF is known in particular for its anti-submarine warfare and minesweeping capabilities. Defense planners believe the most effective approach to combating hostile submarines entails mobilizing all available weapons, including surface combatants, submarines, patrol planes, and helicopters. They are also known to operate at least fourteen listening stations all over the country that have ELINT and marine surveillance radar warning systems.

Historically, the Royal Reian Air Force (RRAF) has been relied on to provide air cover at sea, a role that is subordinate to the RRAF's primary mission of air defense of the home islands. Extended patrols over sea lanes are beyond the RRAF's current capabilities.

The Reian fleet's capacity to provide ship-based antiaircraft warfare protection is limited by the absence of aircraft carriers, though its destroyers and frigates equipped with the Aegis combat system provide a formidable capability in antiaircraft and antimissile warfare. These capabilities are force multipliers, allowing force projection of Reia's sizable destroyer and frigate force far from home waters

Ships and submarines

Submarine fleet


The RRMF plans to increase the number of submarines from the current number to 22 boats.

Class Picture Type Boats Displacement Note
Submarines (20 in Service)
Sōryū class submarine JS Zuiryu under construction Attack submarine RS Sōryū

RS Unryū
RS Hakuryū
RS Kenryū
RS Zuiryū
RS Kokuryū
RS Jinryū
RS Sekiryū
RS Seiryū
RS Shōryū
RS Ōryū

4,200 tonnes The RS Ōryū is world's first submarine powered by lithium-ion batteries. JS Tōryū, which is scheduled to be commissioned in March 2021, is the last of the Soryu-class ships.
Oyashio Class Submarine (JS) Oyashio Attack submarine

RS Uzushio
RS Makishio
RS Isoshio
RS Narushio
RS Kuroshio
RS Takashio
RS Yaeshio
RS Setoshio
RS Mochishio

4,000 tonnes 2 of 11 built converted to training ships.

Surface fleet

Multi-purpose operation destroyers

Class Picture Type Ships Displacement Note
Multi-purpose operation destroyers (1 in Service)
Izumo Class JS Izumo Multi-purpose operation destroyer (de facto aircraft carrier) RS Izumo 27,000 tonnes Re-designated from helicopter destroyer to Multi-purpose operation destroyer following announcement that they will operate STOVL Aircraft.

Guided Missile Battleship

Class Picture Type Ships Displacement Note
Guided Missile Battleship (4 in Service)
Yamato Class Battleship HKS Yamato Guided Missile Battleship HKS Yamato
HKS Musashi
110,000 tonnes Re-designated from Battleship to Guided Missile Battleship follow their modernization.
Nagato Class Battleship HKS Nagato.jpg Guided Missile Battleship HKS Nagato
HKS Mutsu
40,500 tonnes Re-designated from Battleship to Guided Missile Battleship follow their modernization.

Landing ships

Class Picture Type Ships Displacement Note
Landing ships - LST (3 in Service)
Ōsumi class MV-22B trying to land aboard JDS Shimokita.jpg Landing ship tank RS Ōsumi

RS Shimokita
RS Kunisaki

14,000 tonnes The Reian MoD is planning to perform a major refit on the Osumi-class to improve their amphibious capabilities.
Landing craft - LCU (9 in Service)
LCU-2001 Class JMSDF LCU-2002.jpg Utility landing craft RS LC No.1

RS LC No.2

540 tonnes
YL-09 class JMSDF YL-14 right front view at Maizuru Naval Base July 27, 2014.jpg landing craft mechanized RS YL-11
RS YL-12
RS YL-13
RS YL-14
RS YL-15
RS YL-16
RS YL-17
50 tonnes

Littoral Combat Ship

Class Picture Type Ships Displacement Note
Littoral Combat Ship (10 in Service)
Sarushima class LCSS.jpg Littoral Combat Ship HKS Sarushima
HKS Sasebo
HKS Yokosuka
HKS Hajima
HKS Oshima
HKS Awashima
HKS Kurushima
HKS Kikoshima
HkS Iōjima
HKS Ojika
2,500 tonnes the Sarushima class LCS is the main paradial ship of the RRMF and part of the Naval Light Reaction Fleet of the RRMF

Destroyers - DDG/DD

The RRMF uses the official term Destroyers despite some larger ships being analogous to cruisers and smaller vessels being analogues of frigates by most international classifications.

Class Picture Type Ships Displacement Note
Destroyers - DDG/DD (56 in Service)
Maya class JS Haguro Guided missile destroyer (Aegis) HKS Maya
10,500 tonnes HKS Haguro is expected to be in commission by 2021.
Atago class JDS Ashigara Guided missile destroyer (Aegis) HKS Atago
HKS Ashigara
HKS Akagi
HKS Amatsu
HKS Asuka
HKS Atsui
HKS Ashikaze
HKS Ashidate
HKS Komaki
HKS Maru
HKS Suribachi
HKS Daimaru
HKS Bizan
HKS Hyakujo
HKS Kabutoyama
HKS Mikami
HKS Katsuma
HKS Hakusan
HKS Iwahara
10,000 tonnes
Kongō Class JS Kongo Guided missile destroyer (Aegis) HKS Kongō

HKS Kirishima
HKS Myōkō
HKS Chōkai

9,500 tonnes
Hatakaze class US Navy 101206-N-2562W-013 The Japan Maritime Self-Defense ship JS Hatakaze (DDG 171) is participating in exercise Keen Sword 2011.jpg Guided missile destroyer HKS Shimikaze 5,900 tonnes
Asahi class JS Asahi Destroyer HKS Asahi
HKS Shiranui
6,800 tonnes
Akizuki-class JS Fuyuzuki Destroyer HKS Akizuki

HKS Teruzuki
HKS Suzutsuki
HKS Fuyuzuki

6,800 tonnes
Takanami class JDS Takanami Destroyer HKS Takanami

HKS Onami
HKS Makinami
HKS Sazanami
HKS Suzunami

6,300 tonnes
Murasame class JDS Samidare DD106.jpg Destroyer HKS Murasame

HKS Harusame
HKS Yudachi
HKS Kirisame
HKS Inazuma
HKS Samidare
HKS Ikazuchi
HKS Akebono
HKS Ariake

6,100 tonnes
Asagiri class JDS Hamagiri Small destroyer HKS Asagiri

HKS Yamagiri
HKS Yūgiri
HKS Amagiri
HKS Hamagiri
HKS Setogiri
HKS Sawagiri
HKS Umigiri

4,900 tonnes
Hatsayuki class JMSDF DD-127 Isoyuki.jpg Small destroyer HKS Matsuyuki
HKS Asayuki
4,000 tonnes

Destroyer escorts - DE

Class Picture Type Ships Displacement Note
Destroyer escorts - DE (6 in Service)
Abukuma class DestroyerEscorts231&232&234.JPG Destroyer escort (or corvette) RS Abukuma

RS Jintsu
RS Oyodo
RS Sendai
RS Chikuma
RS Tone

2,550 tonnes

Mine countermeasure vessels

Class Picture Type Ships Displacement Note
Mine countermeasure vessels (24 in Service)
Uraga-class Uraga.JPG Minesweeper RS Uraga

RS Bungo

5,500 tonnes Categorized as "mine-countermeasures support ship".
Awaji-class MSO 304 Awaji.jpg Minesweeper RS Awaji

RS Hirado

690 tonnes RS Etajima will be commissioned in March 2021.
Enoshima-class MSC-604 Enoshima in Yokosuka.JPG Minesweeper RS Enoshima

RS Chichijima
RS Hatsushima

570 tonnes
Hirashima-class MSC-602-YAKUSHIMA.JPG Minesweeper RS Hirashima

RS Yakushima
RS Takashima

570 tonnes
Sugashima-class JMDSF MSC688 Aishima-090218-N-4811K-874.jpg Minesweeper RS Sugashima

RS Notojima
RS Tsunoshima
RS Naoshima
RS Toyoshima
RS Ukushima
RS Izushima
RS Aishima
RS Aoshima
RS Miyajima
RS Shishijima
RS Kuroshima

570 tonnes
Ieshima-class JMSDF MSC-677 MAKISHIMA.jpg Minesweeper controller RS Yugeshima
RS Nagama
570 tonnes Reconverted Uwajima-class minesweeper.

Patrol vessels

Class Picture Type Ships Displacement Note
Patrol vessels (6 in Service)
Hayabusa PB PG-827 KUMATAKA.JPG Patrol boat RS Hayabusa

RS Wakataka
RS Otaka
RS Kumataka
RS Umitaka
RS Shirataka

240 tonnes

Training vessels

Class Picture Type Ships Displacement Note
Training vessels (8 in Service)
Kashima class TV 3508 - JDS Kashima.jpg Cadet training ship Kashima 4,050 tonnes
Shimayuki-class Shirayuki.JPG Training vessel RS Shimayuki
RS Setoyuki
3,000 tonnes Reconverted Hatsuyuki-class destroyers.
Hatakaze class US Navy 101206-N-2562W-013 The Japan Maritime Self-Defense ship JS Hatakaze (DDG 171) is participating in exercise Keen Sword 2011.jpg Training vessel RS Hatakaze 5,900 tonnes Converted Hatakaze-class guided missile destroyer.
Oyashio class (JDS) Oyashio Training submarine RS Oyashio
RS Michishio
4,000 tonnes Reconverted Oyashio-class submarines.
Kurobe-class ATS-4202-KUROBE.png Training support ship JS Kurobe (ATS-4202)
Tenryu-class JS Tenryū at Hanshin Base, -20 Jul. 2008 a.jpg Training support ship JS Tenryu (ATS-4203)


The following details the officer ranks of the RRMF, showing the Reian rank, the English translation and the NATO equivalent.

Commissioned officer ranks

Cap badges:

All commissioned officer rank names were the same as their army counterparts. The navy would prefix the common rank names with "Kaigun" (海軍), while the army would prefix them with "Rikugun" (陸軍), meaning "Navy" and "Army", respectively. There was a minor difference in pronunciation of character 大 for Navy Lieutenant and Navy Captain. The navy pronounced it as "Dai", while the army pronounced it as "Tai". See the table below for details:

All-forces ranks English translation RRMF insignia (sleeve) RRMF insignia (collar & shoulder boards)
Lord high admiral of the High Kingdom of Reia
Imperial Japan-Navy-OF-10-sleeve.svg OF-10 - Kaigun Daigensui.gif
Grand Admiral
(Admiral of the fleet)
Imperial Japan-Navy-OF-9-sleeve.svg元帥徽章.svg
(Same insignia as admiral; with enamelled breast badge)
Imperial Japan-Navy-OF-9-collar.svg
Admiral Imperial Japan-Navy-OF-9-sleeve.svg Imperial Japan-Navy-OF-9-collar.svg
Vice-admiral Imperial Japan-Navy-OF-8-sleeve.svg Imperial Japan-Navy-OF-8-collar.svg
Rear-admiral Imperial Japan-Navy-OF-7-sleeve.svg Imperial Japan-Navy-OF-7-collar.svg
Captain Imperial Japan-Navy-OF-5-sleeve.svg Imperial Japan-Navy-OF-5-collar.svg
Commander Imperial Japan-Navy-OF-4-sleeve.svg Imperial Japan-Navy-OF-4-collar.svg
Lieutenant-commander Imperial Japan-Navy-OF-3-sleeve.svg Imperial Japan-Navy-OF-3-collar.svg
Lieutenant Imperial Japan-Navy-OF-2-sleeve.svg Imperial Japan-Navy-OF-2-collar.svg
(Lieutenant junior grade)
Imperial Japan-Navy-OF-1b-sleeve.svg Imperial Japan-Navy-OF-1b-collar.svg
Ensign Imperial Japan-Navy-OF-1a-sleeve.svg Imperial Japan-Navy-OF-1a-collar.svg

Enlisted rates

All-forces ranks RRMF insignia (upper sleeve) after 1 November 1942
Before 1 November 1911 After 1 November 1911
Rank English translation Rank English translation
Petty officers 下士官 (Kashikan)
Petty officer first class 上等兵曹
Chief petty officer Rank insignia of jōtōheisō of the Imperial Japanese Navy.svg
Petty officer second class 一等兵曹
Petty officer first class Rank insignia of ittōheisō of the Imperial Japanese Navy.svg
Petty officer third class 二等兵曹
Petty officer second class Rank insignia of nitōheisō of the Imperial Japanese Navy.svg
Enlisted/Seamen 水兵 (Suihei)
Seaman first class 水兵長
Leading seaman Rank insignia of suiheichō of the Imperial Japanese Navy.svg
Seaman second class 上等水兵
(senior seaman)
Able seaman Rank insignia of jōtōsuihei of the Imperial Japanese Navy.svg
Seaman third class 一等水兵
(seaman first class)
Ordinary seaman Rank insignia of ittōsuihei of the Imperial Japanese Navy.svg
(seaman fourth class)
(seaman second class)
Seaman recruit Rank insignia of nitōsuihei of the Imperial Japanese Navy.svg