Japanese cruiser Mikuma
Encyclopedia
was the second vessel in the four-vessel Mogami-class
Mogami class cruiser
The were a class of four heavy cruisers built for the Imperial Japanese Navy in the mid-1930s. All four fought in World War II, and were sunk.-Design:...

 of heavy cruiser
Heavy cruiser
The heavy cruiser was a type of cruiser, a naval warship designed for long range, high speed and an armament of naval guns roughly 203mm calibre . The heavy cruiser can be seen as a lineage of ship design from 1915 until 1945, although the term 'heavy cruiser' only came into formal use in 1930...

s in the Imperial Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

. It was named after the Mikuma river in Oita prefecture
Oita Prefecture
is a prefecture of Japan on Kyūshū Island. The prefectural capital is the city of Ōita.- History :Around the 6th century Kyushu consisted of four regions: Tsukushi-no-kuni 筑紫国, Hi-no-kuni 肥国, and Toyo no kuni...

, Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

.

Background

Built under the 1931 Fleet Replenishment Program, the Mogami-class cruisers were designed to the maximum limits allowed by the Washington Naval Treaty
Washington Naval Treaty
The Washington Naval Treaty, also known as the Five-Power Treaty, was an attempt to cap and limit, and "prevent 'further' costly escalation" of the naval arms race that had begun after World War I between various International powers, each of which had significant naval fleets. The treaty was...

, using the latest technology. This resulted in the choice of a 155 mm dual purpose (DP) main battery
Main battery
Generally used only in the terms of naval warfare, the main battery is the primary weapon around which a ship was designed. "Battery" is in itself a common term in the military science of artillery. For example, the United States Navy battleship USS Washington had a main battery of nine guns...

 in five triple turret
Turret
In architecture, a turret is a small tower that projects vertically from the wall of a building such as a medieval castle. Turrets were used to provide a projecting defensive position allowing covering fire to the adjacent wall in the days of military fortification...

s capable of 55° elevation. To save weight, electric welding
Welding
Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material that cools to become a strong joint, with pressure sometimes...

 was used, as was aluminum in the superstructure
Superstructure
A superstructure is an upward extension of an existing structure above a baseline. This term is applied to various kinds of physical structures such as buildings, bridges, or ships...

, and the use of a single funnel stack
Funnel
A funnel is a pipe with a wide, often conical mouth and a narrow stem. It is used to channel liquid or fine-grained substances into containers with a small opening. Without a funnel, spillage would occur....

. New impulse geared turbine
Turbine
A turbine is a rotary engine that extracts energy from a fluid flow and converts it into useful work.The simplest turbines have one moving part, a rotor assembly, which is a shaft or drum with blades attached. Moving fluid acts on the blades, or the blades react to the flow, so that they move and...

 engines, coupled with very heavy anti-aircraft
Anti-aircraft warfare
NATO defines air defence as "all measures designed to nullify or reduce the effectiveness of hostile air action." They include ground and air based weapon systems, associated sensor systems, command and control arrangements and passive measures. It may be to protect naval, ground and air forces...

 protection, gave the class a very high speed and protection. However, the Mogami-class was also plagued with technical problems due to its untested equipment and proved to be unstable and top-heavy as well, due to cramming in too much equipment into a comparatively small hull.

Early career

Mikuma was completed at Mitsubishi
Mitsubishi Heavy Industries
, or MHI, is a Japanese company. It is one of the core companies of Mitsubishi Group.-History:In 1870 Yataro Iwasaki, the founder of Mitsubishi took a lease of Government-owned Nagasaki Shipyard. He named it Nagasaki Shipyard & Machinery Works, and started the shipbuilding business on a full scale...

's Nagasaki shipyards on 29 August 1935.

Beginning in 1939, Mikuma was brought in for substantial reconstruction, replacing the triple 155 mm turrets with twin 203 mm guns (the 155 mm turrets going to the battleship Yamato
Japanese battleship Yamato
, named after the ancient Japanese Yamato Province, was the lead ship of the Yamato class of battleships that served with the Imperial Japanese Navy during World War II. She and her sister ship, Musashi, were the heaviest and most powerfully armed battleships ever constructed, displacing...

). Torpedo bulges were also added to improve stability, but the increased displacement caused a reduction in speed.

Mikuma participated in the occupation of Cochinchina
Cochinchina
Cochinchina is a region encompassing the southern third of Vietnam whose principal city is Saigon. It was a French colony from 1862 to 1954. The later state of South Vietnam was created in 1954 by combining Cochinchina with southern Annam. In Vietnamese, the region is called Nam Bộ...

, French Indochina
French Indochina
French Indochina was part of the French colonial empire in southeast Asia. A federation of the three Vietnamese regions, Tonkin , Annam , and Cochinchina , as well as Cambodia, was formed in 1887....

, after Japan and Vichy French authorities reached an understanding on use of its air facilities and harbors from July 1941, from its forward operating base on Hainan
Hainan
Hainan is the smallest province of the People's Republic of China . Although the province comprises some two hundred islands scattered among three archipelagos off the southern coast, of its land mass is Hainan Island , from which the province takes its name...

. At the time of the attack on Pearl Harbor
Attack on Pearl Harbor
The attack on Pearl Harbor was a surprise military strike conducted by the Imperial Japanese Navy against the United States naval base at Pearl Harbor, Hawaii, on the morning of December 7, 1941...

, Mikuma was assigned to cover the invasion of Malaya
British Malaya
British Malaya loosely described a set of states on the Malay Peninsula and the Island of Singapore that were brought under British control between the 18th and the 20th centuries...

 as part of Cruiser Division 7 under Vice Admiral
Vice admiral (United States)
In the United States Navy, the United States Coast Guard, the United States Public Health Service Commissioned Corps, the National Oceanic and Atmospheric Administration Commissioned Corps, and the United States Maritime Service, vice admiral is a three-star flag officer, with the pay grade of...

 Jisaburo Ozawa
Jisaburo Ozawa
was an admiral in the Imperial Japanese Navy during World War II. He was the last Commander-in-Chief of Combined Fleet. Many military historians regard Ozawa as one of the most capable Japanese flag officers.-Biography:...

's First Southern Expeditionary Fleet, providing close support for landings of Japanese troops at Singora, Patani and Kota Bharu
Kota Bharu
Kota Bharu is a city in Malaysia, is the state capital and Royal City of Kelantan. It is also the name of the territory in which Kota Bharu City is situated. The name means 'new city' or 'new castle/fort' in Malay. Kota Bharu is situated in the northeastern part of Peninsular Malaysia, and lies...

.

In December 1941, Mikuma was tasked with the invasion of British Borneo
Sarawak
Sarawak is one of two Malaysian states on the island of Borneo. Known as Bumi Kenyalang , Sarawak is situated on the north-west of the island. It is the largest state in Malaysia followed by Sabah, the second largest state located to the North- East.The administrative capital is Kuching, which...

, together with Mogami, covering landings of Japanese troops at Miri
Miri
Miri is a city in northern Sarawak, Malaysia, on the island of Borneo. It is the second largest city in Sarawak, with a population of about 300,000, and the government administrative centre of Miri District in Miri Division....

 and Kuching
Kuching
Kuching , officially the City of Kuching, and formerly the City of Sarawak, is the capital and most populous city of the East Malaysian state of Sarawak. It is the largest city on the island of Borneo, and the fourth largest city in Malaysia....

. In February 1942, Mikuma was tasked with covering landings of Japanese troops in Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

 and Java
Java
Java is an island of Indonesia. With a population of 135 million , it is the world's most populous island, and one of the most densely populated regions in the world. It is home to 60% of Indonesia's population. The Indonesian capital city, Jakarta, is in west Java...

. On 10 February, Mikuma and Chokai were attacked by USS Searaven
USS Searaven (SS-196)
USS Searaven , a Sargo-class submarine, was the only ship of the United States Navy to be named for the sea raven, a sculpin of the northern Atlantic coast of America....

, which fired four torpedoes, but missed.

The Battle of Sunda Strait

At 2300 on 28 February 1942, Mikuma and Mogami, destroyer Shikinami
Japanese destroyer Shikinami
was the 12th of 24 destroyers, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

, light cruiser Natori
Japanese cruiser Natori
was a Nagara-class light cruiser in the Imperial Japanese Navy. It was named after the Natori River in Miyagi prefecture, Japan.-Background:Natori was the fourth vessel completed in the Nagara-class of light cruisers...

 and destroyers Shirakumo
Japanese destroyer Shirakumo
was a destroyer and the eighth in a class of twenty-four vessels built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

, Murakumo
Japanese destroyer Murakumo
was a Fubuki class was the fifth of twenty-four destroyers, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

, Shirayuki
Japanese destroyer Shirayuki
was a Fubuki classwas the second of twenty-four destroyers, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

, Hatsuyuki
Japanese destroyer Hatsuyuki
was a Fubuki class was the third of twenty-four destroyers, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

 and Asakaze arrived and engaged USS Houston
USS Houston (CA-30)
USS Houston , nicknamed the "Galloping Ghost of the Java Coast", was a Northampton-class heavy cruiser of the United States Navy...

  and HMAS Perth
HMAS Perth (D29)
HMAS Perth was a Modified Leander class light cruiser operated by the Royal Australian Navy during World War II. She was constructed for the Royal Navy , and commissioned as HMS Amphion in 1936...

 with gunfire and torpedoes after the Allied vessels attacked Japanese transports in the Sunda Strait
Sunda Strait
The Sunda Strait is the strait between the Indonesian islands of Java and Sumatra. It connects the Java Sea to the Indian Ocean...

. At 2355, Houston scored hits on Mikuma that knocked out her electrical power, but it was quickly restored. During the battle, Mikuma lost six men and eleven others were wounded. Both Houston and Perth were sunk during the engagement, as was transport Ryujo Maru with IJA 16th Army commander Lieutenant General
Lieutenant General (United States)
In the United States Army, the United States Air Force and the United States Marine Corps, lieutenant general is a three-star general officer rank, with the pay grade of O-9. Lieutenant general ranks above major general and below general...

 Hitoshi Imamura
Hitoshi Imamura
-External links:...

--although the general survived the sinking.

In March, Mikuma and Cruiser Division 7 were based out of Singapore
Singapore
Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

 to cover Japanese landings in Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

 and the seizure of the Andaman Islands
Andaman Islands
The Andaman Islands are a group of Indian Ocean archipelagic islands in the Bay of Bengal between India to the west, and Burma , to the north and east...

.

From 1 April 1942 Cruiser Division 7 based from Mergui
Mergui
Myeik is a city in Tanintharyi Division in Myanmar , located in the extreme south of the country on the coast of an island on the Andaman Sea. the estimated population was over 209,000. The area inland from the city is a major smuggling corridor into Thailand.-History:Myeik was the southernmost...

 joined with Cruiser Division 4 to participate in the Indian Ocean raids. Mikuma, Mogami and destroyer Amagiri
Japanese destroyer Amagiri
was the 15th of 24 s, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world. They served as first-line destroyers through the 1930s, and remained formidable weapons systems well into the Pacific War. She...

 detached and formed the Southern Group, which hunted for merchant shipping in the Bay of Bengal
Bay of Bengal
The Bay of Bengal , the largest bay in the world, forms the northeastern part of the Indian Ocean. It resembles a triangle in shape, and is bordered mostly by the Eastern Coast of India, southern coast of Bangladesh and Sri Lanka to the west and Burma and the Andaman and Nicobar Islands to the...

, while Chokai, Destroyer Squadron 4's light cruiser Yura
Japanese cruiser Yura
The was the third of the six vessels completed in the Nagara class of light cruisers, and like other vessels of her class, she was intended for use as the flagship of a destroyer flotilla. She was named after the Yura River near Kyoto, Japan.-Early career:...

 and destroyers Ayanami
Japanese destroyer Ayanami
was the eleventh of twenty-four , built for the Imperial Japanese Navy following World War I. When introduced into services, these ships were the most powerful destroyers in the world...

, Yugiri
Japanese destroyer Yugiri
was the fourteenth of twenty-four destroyers, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

, Asagiri
Japanese destroyer Asagiri
was the thirteenth of twenty-four destroyers, built for the Imperial Japanese Navy following World War I. When introduced into service, these ships were the most powerful destroyers in the world...

 and Shiokaze
Japanese destroyer Shiokaze
was a destroyer, built for the Imperial Japanese Navy immediately following World War I. Advanced for their time, these ships served as first-line destroyers through the 1930s, but were considered obsolescent by the start of the Pacific War.-History:...

 covered the northern areas. During the operation, the "Southern Group" claimed kills on 7,726-ton British passenger ship Dardanus and 5,281-ton British steamship Ganara and the 6,622-ton British merchant vessel Indora,, en route from Calcutta to Mauritius
Mauritius
Mauritius , officially the Republic of Mauritius is an island nation off the southeast coast of the African continent in the southwest Indian Ocean, about east of Madagascar...

.

On 22 April, Cruiser Division 7 returned to Kure, and Mikuma went into dry dock
Dry dock
A drydock is a narrow basin or vessel that can be flooded to allow a load to be floated in, then drained to allow that load to come to rest on a dry platform...

 for overhaul. On 26 May, Cruiser Division 7 arrived at Guam
Guam
Guam is an organized, unincorporated territory of the United States located in the western Pacific Ocean. It is one of five U.S. territories with an established civilian government. Guam is listed as one of 16 Non-Self-Governing Territories by the Special Committee on Decolonization of the United...

 to provide close support for Rear Admiral Raizo Tanaka
Raizo Tanaka
was a rear admiral in the Imperial Japanese Navy during most of World War II. A specialist in the heavy torpedoes that were carried by all the destroyers and cruisers of the IJN, Tanaka mainly commanded destroyer squadrons, with a cruiser or two attached, and he was the primary leader of the...

's Midway Invasion Transport Group. Mikuma's crew was advised that upon the completion of the Midway
Midway Atoll
Midway Atoll is a atoll in the North Pacific Ocean, near the northwestern end of the Hawaiian archipelago, about one-third of the way between Honolulu, Hawaii, and Tokyo, Japan. Unique among the Hawaiian islands, Midway observes UTC-11 , eleven hours behind Coordinated Universal Time and one hour...

 operation they would proceed to the Aleutian Islands and from there to Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

.

Battle of Midway

On 5 June, Admiral Isoroku Yamamoto, CINC of the Combined Fleet
Combined Fleet
The was the main ocean-going component of the Imperial Japanese Navy. The Combined Fleet was not a standing force, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units normally under separate commands in peacetime....

 ordered Cruiser Division 7 to shell Midway in preparation for a Japanese landing. Cruiser Division 7 and DesDiv 8 were 410 miles (659.8 km) away from the island, so they made a high-speed dash at 35 knots (68.6 km/h). The sea was choppy and the destroyers lagged behind. At 2120, the order was canceled. However, this dash placed Cruiser Division 7 within torpedo range of the USS Tambor
USS Tambor (SS-198)
USS Tambor , the lead ship of her class of submarine, was the only ship of the United States Navy to be named for the tambor.Her keel was laid down on 16 January 1939 by the Electric Boat Company in Groton, Connecticut. She was launched on 20 December 1939 sponsored by Miss Lucia Ellis, and...

, which was spotted by Kumano
Japanese cruiser Kumano
Kumano was one of four Mogami-class heavy cruiser of the Imperial Japanese Navy. She was completed at the Kawasaki Shipyard in Kobe on 31 October 1937. She displaced with a length of and a beam of , and had a top speed of...

. Kumano signaled a 45° simultaneous turn to starboard to avoid possible torpedoes. The emergency turn was correctly executed by the flagship and Suzuya, but the third ship in the line, Mikuma, erroneously made a 90° turn. Behind her, Mogami turned 45° as commanded. This resulted in a collision in which Mogami rammed Mikuma's portside, below the bridge. Mogami's bow caved in and she was badly damaged. Mikuma's portside oil tanks ruptured and she began to spill oil, but otherwise her damage was slight. Arashio
Japanese destroyer Arashio
was the fourth of ten destroyers built for the Imperial Japanese Navy in the mid-1930s under the Circle Two Supplementary Naval Expansion Program .-History:...

 and Asashio
Japanese destroyer Asashio
was the lead ship of the ten destroyers built for the Imperial Japanese Navy in the mid-1930s under the Circle Two Program .-History:...

 were ordered to stay behind and escort Mogami and Mikuma. At 0534, retiring Mikuma and Mogami were bombed from high altitude by eight Boeing
Boeing
The Boeing Company is an American multinational aerospace and defense corporation, founded in 1916 by William E. Boeing in Seattle, Washington. Boeing has expanded over the years, merging with McDonnell Douglas in 1997. Boeing Corporate headquarters has been in Chicago, Illinois since 2001...

 B-17 Flying Fortresses from Midway, but they scored no hits. At 0805, six USMC
United States Marine Corps
The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

 Douglas SBD Dauntless
SBD Dauntless
The Douglas SBD Dauntless was a naval dive bomber made by Douglas during World War II. The SBD was the United States Navy's main dive bomber from mid-1940 until late 1943, when it was largely replaced by the SB2C Helldiver...

 dive-bombers and six Vought
Vought
Vought is the name of several related aerospace firms. These have included, in the past, Lewis and Vought Corporation, Chance Vought, Vought Sikorsky, LTV Aerospace , Vought Aircraft Companies, and the current Vought Aircraft Industries. The first incarnation of Vought was established by Chance M...

 SB2U Vindicator
SB2U Vindicator
The Vought SB2U Vindicator was a carrier-based dive bomber developed for the United States Navy in the 1930s, the first monoplane in this role. Obsolescent at the outbreak of World War II, Vindicators still remained in service at the time of the Battle of Midway, but by 1943, all had been withdrawn...

s from Midway attacked Mikuma and Mogami but they did not achieve any direct hits. A Vindicator flown by Capt. Richard E. Fleming
Richard E. Fleming
Captain Richard E. Fleming was a United States Marine who received the Medal of Honor for his heroism in World War II during the Battle of Midway. Fleming piloted a Vought SB2U Vindicator dive bomber in an attack on the ....

 gallantly pressed home his attack despite having been set ablaze by anti-aircraft fire. He nearly scored a hit before crashing into the sea.
The following morning, 6 June 1942, Mikuma and Mogami were heading for Wake Island
Wake Island
Wake Island is a coral atoll having a coastline of in the North Pacific Ocean, located about two-thirds of the way from Honolulu west to Guam east. It is an unorganized, unincorporated territory of the United States, administered by the Office of Insular Affairs, U.S. Department of the Interior...

 when they were attacked by three waves of 31 SBD Dauntless
SBD Dauntless
The Douglas SBD Dauntless was a naval dive bomber made by Douglas during World War II. The SBD was the United States Navy's main dive bomber from mid-1940 until late 1943, when it was largely replaced by the SB2C Helldiver...

 dive-bombers from USS Enterprise
USS Enterprise (CV-6)
USS Enterprise , colloquially referred to as the "Big E," was the sixth aircraft carrier of the United States Navy and the seventh U.S. Navy ship to bear the name. Launched in 1936, she was a ship of the Yorktown class, and one of only three American carriers commissioned prior to World War II to...

 and USS Hornet
USS Hornet (CV-8)
USS Hornet CV-8, the seventh ship to carry the name Hornet, was a of the United States Navy. During World War II in the Pacific Theater, she launched the Doolittle Raid on Tokyo and participated in the Battle of Midway and the Buin-Faisi-Tonolai Raid...

. Arashio and Asashio were each hit by a bomb. Mogami was hit by six bombs. Mikuma was hit by at least five bombs in the forecastle, bridge area and amidships and set afire. The hit on the forecastle put the forward guns out of commission. The hit near the bridge area set off some AA shells and caused considerable damage to the bridge and personnel. The hit amidships set off several torpedoes and the resultant explosions destroyed the ship. Captain Sakiyama was severely wounded. Mikuma turned on her portside and sank at 29°20′N 173°30′E. (It has also been suggested that either Asashio or Suzuya scuttled Mikuma the following day).

Asashio rescued Captain Sakiyama, who was transferred to Suzuya for medical attention, but he died 4 days later. Mogami, Asashio and Arashio rescued 240 survivors, but 650 men went down with the ship. On 9 June 1942, the submarine USS Trout
USS Trout (SS-202)
USS Trout was a United States Navy Tambor-class submarine, serving in the Pacific from 1941 to 1944. She received 11 battle stars for World War II service and three Presidential Unit Citations, for her second, third, and fifth patrols...

 rescued two survivors from Mikuma and took them as POWs
Prisoner of war
A prisoner of war or enemy prisoner of war is a person, whether civilian or combatant, who is held in custody by an enemy power during or immediately after an armed conflict...

 to Pearl Harbor
Pearl Harbor
Pearl Harbor, known to Hawaiians as Puuloa, is a lagoon harbor on the island of Oahu, Hawaii, west of Honolulu. Much of the harbor and surrounding lands is a United States Navy deep-water naval base. It is also the headquarters of the U.S. Pacific Fleet...

.

Mikuma was removed from the Navy List on 10 August 1942.

External links

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