Japanese cruiser Iwate

was the second and last armored cruiser (''Sōkō jun'yōkan'') built for the Imperial Japanese Navy (IJN) in the late 1890s. As Japan lacked the industrial capacity to build such warships herself, the ship was built in Britain. She participated in most of the naval battles of the Russo-Japanese War of 1904–1905. The ship was moderately damaged during the Battle of Port Arthur, the Battle off Ulsan, and the Battle of Tsushima. ''Iwate'' played a minor role in World War I and began the first of her many training cruises for naval cadets in 1916, a task that would last until the end of 1939. The ship continued to conduct training in home waters throughout the Pacific War. ''Iwate'' was sunk by American carrier aircraft during the attack on Kure in July 1945. Her wreck was refloated and scrapped in 1946–1947.

Background and description

The 1896 Naval Expansion Plan was made after the First Sino-Japanese War and included four armored cruisers in addition to four more battleships, all of which had to be ordered from British shipyards as Japan lacked the capability to build them itself. Further consideration of the Russian building program caused the IJN to believe that the battleships ordered under the original plan would not be sufficient to counter the Imperial Russian Navy. Budgetary limitations prevented ordering more battleships and the IJN decided to expand the number of more affordable armored cruisers to be ordered from four to six ships. The revised plan is commonly known as the "Six-Six Fleet". Unlike most of their contemporaries which were designed for commerce raiding or to defend colonies and trade routes, ''Iwate'' and her half-sisters were intended as fleet scouts and to be employed in the battleline.

The ship was long overall and between perpendiculars. She had a beam of and had an average draft of . ''Iwate'' displaced at normal load and at deep load. The ship had a metacentric height of . Her crew consisted of 672 officers and enlisted men.Jentschura, Jung & Mickel, p. 74

''Iwate'' had a pair of four-cylinder triple-expansion steam engines, each driving a single propeller shaft. Steam for the engines was provided by 24 Belleville boilers and the engines were rated at a total of . The ship had a designed speed of and reached during her sea trials from . She carried up to of coalBrook 1999, p. 112 and could steam for at a speed of .

The main armament for all of the "Six-Six Fleet" armored cruisers consisted of four guns in twin-gun turrets fore and aft of the superstructure. The secondary armament consisted of 14 Elswick Ordnance Company "Pattern Z" quick-firing (QF), guns. Only four of these guns were not mounted in armored casemates on the main and upper decks and their mounts on the upper deck were protected by gun shields. ''Iwate'' was also equipped with a dozen QF 12-pounder () 12-cwt guns"Cwt" is the abbreviation for hundredweight, 12 cwt referring to the weight of the gun. and eight QF 2.5-pounder () Yamauchi guns as close-range defense against torpedo boats. The ship was equipped with four submerged torpedo tubes, two on each broadside.

All of the "Six-Six Fleet" armored cruisers used the same armor scheme with some minor differences. The waterline belt of Krupp cemented armor ran the full length of the ship and its thickness varied from amidships to at the bow and stern. It had a height of , of which was normally underwater. The upper strake of belt armor was thick and extended from the upper edge of the waterline belt to the main deck. It extended from the forward to the rear barbette. The ''Izumo'' class had oblique 127 mm armored bulkheads that closed off the ends of the central armored citadel.

The barbettes, gun turrets and the front of the casemates were all 6 inches thick while the sides and rear of the casemates were protected by of armor. The deck was thick and the armor protecting the conning tower was in thickness.Chesneau & Kolesnik, p. 225

Construction and career

The contract for ''Iwate'', named after the eponymous prefecture, was signed on 19 July 1898 with Armstrong Whitworth. The ship was laid down at their shipyard in Elswick on 11 November 1898 and launched on 29 March 1900. She was completed on 18 March 1901 and departed for Japan the following day under the command of Captain Hikohachi Yamada, who had been appointed to supervise her construction and bring her back to Japan. ''Iwate'' arrived in Yokosuka on 17 May and Yamada was relieved by Captain Taketomi Kunikane on 6 July.Hackett & Kingsepp

Russo-Japanese War

At the start of the Russo-Japanese War, ''Iwate'' was the flagship of Rear Admiral Misu Sotarō, commander of the 2nd Division of the 2nd Fleet. She participated in the Battle of Port Arthur on 9 February 1904, when Vice Admiral Tōgō Heihachirō led the Combined Fleet in an attack on the Russian ships of the Pacific Squadron anchored just outside Port Arthur. Tōgō had expected the surprise night attack by his destroyers to be much more successful than it was, anticipating that the Russians would be badly disorganized and weakened, but they had recovered from their surprise and were ready for his attack. The Japanese ships were spotted by the protected cruiser , which was patrolling offshore and alerted the Russians. Tōgō chose to attack the Russian coastal defenses with his main armament and engage the ships with his secondary guns. Splitting his fire proved to be a poor decision as the Japanese eight- and six-inch guns inflicted little damage on the Russian ships, which concentrated all their fire on the Japanese ships with some effect. Although many ships on both sides were hit, Russian casualties numbered some 150, while the Japanese suffered roughly 90 killed and wounded before Tōgō disengaged. ''Iwate'' had, in fact, been considerably damaged in the engagement.

In early March, Kamimura was tasked to take the reinforced 2nd Division north and make a diversion off Vladivostok. While scouting for Russian ships in the area, the Japanese cruisers bombarded the harbor and defenses of Vladivostok on 6 March to little effect. Upon their return to Japan a few days later, the 2nd Division was ordered to escort the transports ferrying the Imperial Guards Division to Korea and then to join the ships blockading Port Arthur. Kamimura was ordered north in mid-April to cover the Sea of Japan and defend the Korea Strait against any attempt by the Vladivostok Independent Cruiser Squadron, under the command of Rear Admiral Karl Jessen, to break through and unite with the Pacific Squadron. The two units narrowly missed each other on the 24th in heavy fog and the Japanese proceeded to Vladivostok where they laid several minefields before arriving back at Wonsan on the 30th.

The division failed to intercept the Russian squadron as it attacked several transports south of Okinoshima Island on 15 June due to heavy rain and fog. The Russians sortied again on 30 June and Kamimura finally was able to intercept them the next day near Okinoshima. The light was failing when they were spotted and the Russians were able to disengage in the darkness. Jessen's ships sortied again on 17 July headed for the eastern coast of Japan to act as a diversion and pull Japanese forces out of the Sea of Japan and the Yellow Sea. The Russian ships passed through Tsugaru Strait two days later and began capturing ships bound for Japan. The arrival of the Russians off Tokyo Bay on the 24th caused the Naval General Staff to order Kamimura to sail for Cape Toi Misaki, Kyūshū, fearing that Jessen would circumnavigate Japan to reach Port Arthur. Two days later he was ordered north to the Kii Channel and then to Tokyo Bay on the 28th. The General Staff finally ordered him back to Tsushima Island on the 30th; later that day he received word that Jessen's ships had passed through the Tsugaru Strait early that morning and reached Vladivostok on 1 August.

Battle off Ulsan

On 10 August, the ships at Port Arthur attempted a breakout to Vladivostok, but were turned back in the Battle of the Yellow Sea. Jessen was ordered to rendezvous with them, but the order was delayed. His three armored cruisers, , , and , had to raise steam, so he did not sortie until the evening of 13 August. By dawn he had reached Tsushima, but turned back when he failed to see any ships from the Port Arthur squadron. north of the island he encountered Kamimura's squadron, which consisted of four modern armored cruisers, , , , and ''Iwate''. The two squadrons had passed during the night without spotting one another and each had reversed course around first light. This put the Japanese ships astride the Russian route to Vladivostok.

Jessen ordered his ships to turn to the northeast when he spotted the Japanese at 05:00 and they followed suit, albeit on a slightly converging course. Both sides opened fire around 05:23 at a range of . The Japanese ships concentrated their fire on ''Rurik'', the rear ship of the Russian formation. She was hit fairly quickly and began to fall astern of the other two ships. Jessen turned southeast in an attempt to open the range, but this blinded the Russian gunners with the rising sun and prevented any of their broadside guns from bearing on the Japanese. About 06:00, Jessen turned 180° to starboard in an attempt to reach the Korean coast and to allow ''Rurik'' to rejoin the squadron. Kamimura followed suit around 06:10, but turned to port, which opened the range between the squadrons. ''Azuma'' then developed engine problems and the Japanese squadron slowed to conform with her best speed. Firing recommenced at 06:24 and ''Rurik'' was hit three times in the stern, flooding her steering compartment; she had to be steered with her engines. Her speed continued to decrease, further exposing her to Japanese fire, and her steering jammed to port around 06:40.

Jessen made another 180° turn in an attempt to interpose his two ships between the Japanese and ''Rurik'', but the latter ship suddenly turn to starboard and increased speed and passed between Jessen's ships and the Japanese. Kamimura turned 180° as well so that both squadrons were heading southeast on parallel courses, but Jessen quickly made another 180° turn so that they headed on opposing courses. At this time an eight-inch shell struck the roof of ''Iwate''s starboard forward upper six-inch casemate and ignited the ready-use ammunition. The fire killed 40 and wounded 24 more and knocked out the six-inch gun in that casemate, as well as those below and aft of it. In addition, the 12-pounder above it was rendered inoperable. The Russians reversed course for the third time around 07:45 in another attempt to support ''Rurik'' although ''Rossia'' was on fire herself; her fires were extinguished about twenty minutes later. Kamimura circled ''Rurik'' to the south at 08:00 and allowed the other two Russian ships to get to his north and gave them an uncontested route to Vladivostok. Despite this, Jessen turned back once more at 08:15 and ordered ''Rurik'' to make her own way back to Vladivostok before turning north at his maximum speed, about .Brook 2000, p. 43

About this time Kamimura's two elderly protected cruisers, and , were approaching from the south. Their arrival allowed Kamimura to pursue Jessen with all of his armored cruisers while the two new arrivals dealt with ''Rurik''. They fought a running battle with the Russians for the next hour and a half; scoring enough hits on them to force their speed down to . The Japanese closed to a minimum of about , but Kamimura then opened the range up to .

About 10:00, Kamimura's gunnery officer erroneously informed him that ''Izumo'' had expended three-quarters of her ammunition and he turned back after a five-minute rapid-fire barrage. He did not wish to leave the Tsushima Strait unguarded and thought that he could use his remaining ammunition on ''Rurik''. By this time she had been sunk by ''Naniwa'' and ''Takachiho''. They had radioed Kamimura that she was sunk, but he did not receive the message. Shortly after the Japanese turned back, ''Gromoboi'' and ''Rossia'' were forced to heave-to to make repairs. ''Iwate'' was the most seriously damaged Japanese ship and suffered a total of 40 killed and 37 wounded.

In mid-September, ''Tokiwa'' and ''Iwate'' were transferred to the 1st Division. In early December the cruiser was sent home to refit. In mid-February, she was guarding the Tsugaru Strait and remained there through mid-April.

Battle of Tsushima

As the Russian 2nd and 3rd Pacific Squadrons approached Japan on 27 May, having sailed from the Baltic Sea, they were spotted by patrolling Japanese ships early that morning, but visibility was limited and radio reception poor. The preliminary reports were enough to cause Tōgō to order his ships to put to sea and the 2nd Division spotted the Russian ships under the command of Vice Admiral Zinovy Rozhestvensky at around 11:30. Kamimura closed to about a range of before sheering off under fire to join Tōgō's battleships. ''Iwate'', now the flagship of Rear Admiral Shimamura Hayao, was last in the 2nd Division when Tōgō opened fire on the 2nd Pacific Squadron at 14:10 and, like most of the ships in the division, engaged the battleship which was forced to fall out of formation at 14:50 and sank 20 minutes later. The cruiser also fired upon the battleship before 14:50. The protected cruiser attempted to make a torpedo attack at about 15:06, but was driven off by fire from ''Iwate'' and the armored cruisers and . The battleship suddenly appeared out of the mist at 15:35 at a range of about . All of Kamimura's ships engaged her for five minutes or so with ''Azuma'' and the armored cruiser also firing torpedoes at the Russian ship without effect.

After 17:30 Kamimura led his division in a fruitless pursuit of some of the Russian cruisers, leaving Tōgō's battleships to their own devices. He abandoned his chase around 18:03 and turned northwards to rejoin Tōgō. His ships spotted the rear of the Russian battleline around 18:30 and opened fire when the range closed to 8000–9000 meters. Nothing is known of any effect on the Russians and they ceased fire by 19:30 and rejoined Tōgō at 20:08 as night was falling. The surviving Russian ships were spotted the next morning and the Japanese ships opened fire around 10:30, staying beyond the range at which the Russian ships could effectively reply. Rear Admiral Nikolai Nebogatov therefore decided to surrender his ships as he could neither return fire nor close the range.

In the meantime, the coast defense ship had fallen well behind Nebogatov's ships and was spotted by the protected cruiser early in the morning, but the Japanese were more intent on locating the main body of the Russian fleet than attacking a single isolated ship. ''Admiral Ushakov'' was then spotted at 14:10, well after Nebogatov's surrender, by Shimamura who received permission to pursue her with ''Iwate'' and ''Yakumo''. They caught up with the Russian ship at 17:00 and demanded her surrender. ''Admiral Ushakov'' attempted to close the range to bring the Japanese cruisers within range of her guns, but they were fast enough to keep the range open and the Russian ship never hit either one. After about half an hour, ''Admiral Ushakov'' was listing heavily enough that her guns could not elevate enough to bear and her commander ordered his crew to abandon ship and the scuttling charges detonated. The ship sank in three minutes and 12 officers and 327 crewmen were rescued by the Japanese. Between them, ''Yakumo'' and ''Iwate'' fired 89 eight- and 278 six-inch shells during the engagement. ''Iwate'' was struck 17 times, over the course of the entire battle, including hits that burst in the water alongside. She was, however, only lightly damaged by two hits that caused two compartments on the lower deck to flood. These hits were made by two 12-inch, three 8-inch, two 6-inch, one 120 mm (4.7 in), five 75 mm (3 in), and four unidentified shells.

As the IJN was preparing to invade Sakhalin Island in early July, Kamimura's 2nd Division, now reduced to ''Iwate'', ''Izumo'', and ''Tokiwa'', was tasked to defend the Korea Strait before it escorted troops that made an amphibious landing in northeastern Korea. In mid-August, the division covered the landing at Chongjin, closer to the Russian border. After the war, she was briefly commanded by Captain Yamashita Gentarō from 2 February to 22 November 1906 before he was relieved by Captain Arima Ryokitsu.

Subsequent service

The ship participated in the early stages of the Battle of Tsingtao before returning to Sasebo on 2 October 1914. The following month she was assigned to the First South Seas Squadron, based at Fiji and later at the Marquesas Islands. On 1 September 1915, ''Iwate'' was assigned to the Training Squadron where she conducted long-distance oceanic navigation and officer training for cadets in the Imperial Japanese Navy Academy. She began the first of her 16 training cruises on 20 April 1916, together with ''Azuma'', and visited Australia and Southeast Asia before returning home on 22 August. The ship was relieved of her assignment the next month, but rejoined the Training Squadron a year later in preparation for her next training cruise. ''Iwate'' departed on 2 March 1918, bound for Central America, Hawaii and the South Sea Islands, and returned on 6 July.

Two years later, the ship began her next training cruise on 21 August 1920, visiting South America and the South Sea Islands, before returning on 4 April 1921.Lacroix & Wells, p. 657 On 1 September, she was re-designated as a 1st-class coast-defense ship.Hackett & Kingsepp On 26 June 1922, ''Iwate'', accompanied by ''Izumo'' and ''Yakumo'', began a circumnavigation of the world that took them to Hawaii, Los Angeles, California, through the Panama Canal to Rio de Janeiro, where the cadets viewed the Independence Centenary International Exposition commemorating Brazilian independence. The ships then visited Buenos Aires, Argentina and Durban, South Africa before heading home via the Indian Ocean, where they arrived on 8 February 1923.

In 1924, four of ''Iwate''s 12-pounder guns were removed, as were all of her QF 2.5-pounder guns, and a single 8 cm/40 3rd Year Type anti-aircraft (AA) gun was added. Refitted again in 1931, her torpedo tubes were removed as were all of her main deck 6-inch guns and their casemates plated over; she now carried only two 12-pounders, although she now had three 8 cm/40 3rd Year Type AA guns. In addition her boilers were replaced by six Yarrow boilers with an output of only which reduced her top speed to . She now carried of coal and of fuel oil. Her crew now numbered 726 officers and enlisted men.

The ship continued to make training cruises, usually at two-year intervals, for the rest of the decade that took her to the East Coast of North America and the Mediterranean Sea among other places. One of her cadets on the 1925–26 cruise was Prince Hironobu Fushimi. In December 1928, the ship escorted Emperor Hirohito during an Imperial fleet review in Yokohama harbor. From 1932 the training voyages became annual events, with the exception of 1935, until they ceased at the end of 1939.

''Iwate'' was assigned to the 12th Squadron of the 3rd Support Fleet from 1 February 1940. Despite her antiquated age, she was briefly re-classified as a 1st-class cruiser on 1 July 1942 before she was reclassified as a training ship in 1943.Fukui, p. 4
On 19 March 1945, ''Iwate'' was attacked by American carrier aircraft, killing one crewman, although they failed to inflict any significant damage. Shortly afterwards, her 8-inch guns were replaced by four Type 89 dual-purpose guns in two twin mounts and four of her remaining 6-inch guns were removed. Her light anti-aircraft armament was significantly reinforced by the addition of nine license-built 25 mm Hotchkiss anti-aircraft gun, Hotchkiss Type 96 25 mm AT/AA Gun, 25-millimeter Type 96 light AA guns in one triple, two twin, and two single-gun mounts and two 13.2 mm Hotchkiss machine gun, 13.2-millimeter Hotchkiss machine guns in single mounts.

The ship was bombed during the American aerial attack on Kure on 24 July 1945. While not hit by any bombs, the three near misses sprang the ship's seams and the resulting flooding caused her to sink in shallow water at coordinates the following day. She was removed from the navy list on 30 November and her hulk (ship), hulk was raised and scrapped in 1946–47 by the IHI Corporation, Harima Dock Company.

Notes

Footnotes

References

*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*

External links

{{DEFAULTSORT:Iwate
Izumo-class cruisers
Ships built on the River Tyne
1900 ships
Russo-Japanese War cruisers of Japan
World War I cruisers of Japan
Second Sino-Japanese War cruisers of Japan
World War II cruisers of Japan
Cruisers sunk by aircraft
Shipwrecks in the Inland Sea
World War II shipwrecks in the Pacific Ocean
Maritime incidents in July 1945
Ships sunk by US aircraft
Ships built by Armstrong Whitworth