time for a new entry. Forgive my huge chunks of text and a bit of over-exaggeration, those are my favourite Kokoan heavy cruisers, themselves a personal take on my favourite IJN cruisers...
Senjo Class Heavy Cruiser:
By 1933, under the term of the London Naval Treaty, Koko no Kaigun's staff had submitted to the fact that some of the earlier light cruiser units, despite beign just over 10 years old, had to be disposed in order to give the fleet a chance to field comparable units to those in service with potentual hostile Navies. The naval staff thus concretely accounted the plan to disarm, scrap or convert to training uses the six Kashino Class light cruisers in order to built threee new modern units in their place. The 24.000T that would have been freed this way would have allowed for construction of three newer light cruisers, each displacing 8.000T standard. First draft called for a Mogami-like cruiser with a reduced displacement, sporting four main gun turrets instead of five. This first plan was immediatley revised in late 1933 under Morimoto first reamament bill: ignoring treaty limitations on displacement the new project started from a required battery of fiteen guns. By mid 1934, when the three units were ordered for construction, the design had grown to 9.994T standard. The ship also reached more similarities with the Takao class than the Mogami, as KnK wanted enough flag space to allow the ships to easily act both as cruiser and destroyer flagships as necessities dictated. Armament was finalized at fifteen 152mm guns in five triple turrets, eight 127mm guns in four twin shielded mounts and sixteen 13mm anti-air machine guns in four quadruple mounts. Twelve torpedoes plus reloads fitted in four triple launchrs were also planned. Designers opted specifically on a modified version of the IJN Mogami turrets housing 152mm guns instead of 155mm ones in order to exploit older stocks of ammunition left from the earlier pre-WNT cruiser classes and the Goryo class battlercruisers, all of which had been scrapped. As for protection, side armor was to be 102mm thick, deck 35mm, with a 14mm bulge protecting the engineering spaces. Top speed was planned at 37knots. fire control would have been provived by a Type94 director set with a 6-m rangefinder fitted above the bridge structure, backed by an auxiliary director mountd atop the hangar. 4,5m rangefinders and a Type91 director would have served as the 127mm guns fire control. The main striking differencies, compared to a Japanese Takao clas ship, were the hull, 1,8m longer while keeping the same beam and draft, featuring a sharper stem and lacking the distinctive sloping stern, the different main armament and the hangar structure located some 2,5m aft, allowing the aft funnel trunk to be angled backwards.
The lead ship, senjo, was laid down at Kousaten Navy yard in late 1934, with Tenji following at the same yard by mid 1935. Fujiwara, the third sister, was ordered and started at Toumachi Naval Arsenal in early 1936.
As the three ships were under construction, Morimoto's second rearmament bill passed, at this point all naval construction currently ongoing in Koko could have ingored traties in it's entierely, both for displacement and numbers. This way a new dedicated, smaller, project was started for a new class of light cruisers (with the six Kashino no longer in danger of beign demilitarized) and the three Senjo were ordered to be rearmed and modified as heavy cruisers. three more ships were also ordered, to bring the total count to six vessels. The 152mm turrets were mothballed, reserved for arming the Yashima class battleships, whose design phase started almost immediately, and newer 203mm model-E twin turrets were manifactured. The triple 610mm torpedo mounts were also replaced with newer quadruple ones -initially planned to arm the refitted Kumoi class cruisers- for a total of sixteen torpedoes plus eight reloads. Light anti-aircraft armament was increased to four twin 25mm and two quadruple 13mm machine guns, the latter on sponsons abaft the bridge, in place of a lookout station, most of which were removed. Redesign included an increase of armor protection, with the side belt reaching 127mm of thickness around boiler and engine rooms. Deck armor reached 65mm and the anti-torpedo system was vastly enlarged with it's thickness increased from 14 to 58mm. The new anti-torpedo system also increased the beam to 20,7m. Armor for the main guns varied from 25mm of the turrets themselves to 76mm of the barbettes. fire-control was upgraded, with a new director for the main guns. A composite director-rangefiner tower replaced the spit system of the 127mm guns, and a machine-gun director was added between the funnels. the most noticeable modification was the new aircraft-handling deck: the hangar superstructure was removed and the mainmast shifted aft by almost 23 meters. Airwing also changed from the planned three Nakajima E4N to two Nakajima E8N and a Kawanishi E7K. the foremast was also shortened in height and recieved an RDF room. One last modification done before launch was the addition of a straight bulbous bow below the waterline, a feature that had been studied by Koko no Kaigun designers during the project phase of the kazami class light cruisers and the Yashima class battleships. The resulting ships measured 205,5m overall, with a waterline lenght of 202,6m. Beam was 20,7m and draft had increased from 6,3 to 6,5m. The increase of beam, the new bow, reworked armament and increased armor had took the cruisers displacement up to 14.248T at standard load, for a full load walue of 16.253T. Range was kept as planned at 8.000nm at 14knots, thanks to additional fuel tanks located inside the enlarged bulges of the anti-torpedo system, Speed dropped 1knot from the planned value to 36knots, a figure still deemed highly satisfying.
Senjo was launched in ealry 1938 and commisoned by the end of the year. Tenji, also launched during 1938, was completed ad commissioned by spring 1939. The two units formed Sentai 5.
Fujiwara, built at Toumachi, enjoyed a much quicker construction than her sisters, so that in 1937 she had already been launched. Reworking of the main gun barbettes had been completed, as it was the armor increase and most of the other features planned, but the ship still retained the older curved bow. For this reason Fujiwara underwent a longer fitting-out phase, during which the boww was reconstructed to the new standards. As a consequence of this, the Naval staff choose to equip the cruiser with some of the improvement planned from the second batch ships: eight, more powerful, boilers were fitted instead of then, allowing for more command space inside the lower decks of the bridge. The ship also recived a redesigned and smaller foremast, a new 8-m rangefinder unit on her main-gun director and two extra twin 25mm machine guns in place fo the quadruple 13mm ones fitted on Senjo and Tenji. The airwing was also further updated to two Mitsubishi F1M and one Aiche E13A floatplanes. After completing all of her modifications Fujiwara was commissioned in January 1941, becoming Sentai5 flagship in place of Senjo, thanks to her increased command spaces.
First ship of the second batch, the cruiser Chichibu was laid down at Kousanten Navy Yard in 1938, shortly after the launch of her sister Tenji. fitted from the start with all the features retrofitted to Fujiwara, she was launched in 1940 and commissioned by fall 1941. Aestethically she could be told apart from Fujiwara because of the different steam-pipes layout on her funnels. She was too attached to Sentai 5 upon commissioning.
The fifth and Sixt units, Jimmu and Nintoku, were laid down at Kousaten and Toumachi yards in 1940 and 1941 respectively, but both were not yet in service when the Pacific war started. The four active ships recieved arctic camouflage and sailed for the Aleutians to support the invasion of Attu and Kiska. Later on all four took part in the Battle off Turf Point, with Tenji and Fujiwara beign credited for the sinking of the USS Trenton. After supporting the invasion of Adak, Sentai 5 ships kept patrolling the waters around western Aleutians before finally recalled home by early-January 1942.
After beign quickly repainted in standard grey the four Senjos departed for southern waters accompained by Amagi and a few Destroyer squadrons to support Japanese landings in Borneo. While Patrolling off Balikpapan with Amagi, during the night of January 25th, The ships engaged in combat the British Battlecruiser Irresistible and her escorts, which were on a bombardment mission of the Japanese beacheads. During the battle Senjo and Chichibu engaged british Destroyeres before breaking off the Action as they came under fire from the Battleship Marlborough, suffering moderate damage in the process. before veering away they each launched a spread of torpedoes, that, despite failed to hit their mark, forced the British ship to disegngae too. Tenji hit HMS Exeter twice, setting her on fire before recieving a direct hit from Irresistible 16-inch guns on her port side which destroyed one of her catapult and knocked one of her turbines out of action. Tenji escaped further harm when Amagi diverted Irresistible attention on her, also allowing Fujiwara to execute a torpedo run, hitting Irresistible with two long lance torpedoes that jammed one of her guns and flooded two boiler rooms, forcing the Battlecruiser to retreat. The Fujiwara exchanged gunfire with the Rechercean light cruiser Ravensthorpe, hitting her repeatedly while recieving no hits in return. Shortly after, Senjo and Chichibu exectued one last torpedo attack on the enemy fleet, hitting HMAS Vendetta, wich blew up and sank. The ABDACOM fleet retreated afterwards.
With Tenji, Senjo and Chichibu returning to Koko for repairs, Fujiwara was left as the sole Sentai 5 ship still depoyed in the southeast Asia area. She kept escorting convoys and guarding beacheads before being rejoined by Senjo and Chichibu by the end of February. The three ships took part in the Battle of the sunda strait, assiting IJN Mogami and Mikuma in the sinking of the USS houston HMRS Mondrain and HMAS Perth. By late march Senjo, Chichubu and Fujiwara returned to Koko, beign rejoined by Tenji sortly after as her repairs were completed. Chichibu and Fujiwara were present at the Battle of Coral Sea, and all four were part of the joint IJN and KNK main body during the Battle off Midway and took no part in the action whatsoever.
After five months of uneventful patrols split between Midway and the Aleutians the four Senjos departed once again fro Kokoan waters bound for the Solomon Islands, here they took part in the Third naval battle of Guadalcanal. Fujiwara proved herself to be the most succesful of her sisters once again, hitting the USS colorado with a torpedo and damaging the USS Helena with gunfire. She also shared the sinking of the light cruiser Concord with the IJN Takao. Both Senjo and Tenji hit the USS San diego, later finished off by Sendai, suffering five and eight hits in return, the most serious ones knocking out of action the forward starboard 127mm mount on Senjo. Of the Four, Chichibu took the short end of the stick, suffering seventeen 8-inch hits from the USS Pensacola, which put out of action two main turrets, one 127mm mount, all 25mm guns at midship, damaged five boilers, started a fire at midship and forced the crew to jettison all torpedoes in order to avoid further trouble. Chichibu limped away from the battle making ten knots with a 12° list to starboard. She suffered 56 killed and 121 wounded, and was not back in service until late April 1943.
Meanwhile after been launched from Kousaten Navy Yard, the fifth ship of the class, Jimmu, completed her sea trials and was commissioned into Koko no Kaigun, joining her sisters into Sentai 5. Compared to her earlier sisters, she was fitted with newer main gun directors and the machine gun directors were moved further aft for better arcs of operation. The two wing lookout posts were eliminated, as it was for the two platforms located just abaft them, the lookout post at the top of the bridge lost it's shield too and the signalling lamp platforms abaft the bridge were expanded. An anti-aircraft command post was added above the navigation bridge and a ready-room for the anti-aircraft crew was added at midship. AA fit was also augmented by the addition of two extra twin mounts, bringing the count to sixteen barrels. Jimmu was also fitted from the start with a Type-21 air-search radar on top of the foremast. She also had a reduced number of portholes.
Now part of a five-ship strong Sentai, Senjo, Tenji, Fujiwara, Chichibu and Jimmu reached Truk and then Rabaul, later taking part in the battle of Solomon Sea. Beign it a carrier battle their only action result was shooting down a few planes during the engagement. The sisters did not battled against surface ships again until the night of Semptember 5th 1943, when the Naval battle off Makira was fought near San Cristobàl Island. The Kokoan heavy cruisers managed to sink the USS Fresno (CL-84) and Newark (CL-88), the latter sunk with a combination of gunfire and torpedoes by Fujiwara, but failed to prevent the Americans to land their troops on the island. A little more than two months later, on November 28th the five cruisers, operating together with the IJN Aoba and Kinugasa, engaged a sizable US and Recerchean fleet led by the USS Baltimore in the battle of cape Zeele. The engagement started well for the Japanese/koakoan side, as two torpedoes launched by Jimmu hit and put out of action the light cruiser Mobile while Fujiwara repeatedly hit the Pasadena, knocking out of action her entire forward battery. Soon after The ships came under heavy and accurate fire from the heavy cruisers Baltimore and San Francisco, which hit Kinugasa twenty-five times, damaging her guns and engines and stopping the cruiser dead in the water when her torpedo tubes exploded. Jimmu opened fire hitting San francisco twice before beign hit in response by the Light Cruiser Cleveland, which scored three hits on the bridge, killing most of the personnel, including her commanding officer. Senjo veered right with Tenji and Chichibu, targeting Recerchean cruisers Stokes and Munglinup, hitting them four and seven times respectively before suffering four and six hits in return (whle Tenji recieved none). Senjo then attempted a torpedo attack against them but was in turn hit by a fish previously fired by the USS Fletcher. Fujiwara then engaged directly the Baltimore, hitting her four times and starting a fire on her aft superstructure. The American cruiser immediatley replied with extremely accurate radar-directed gunfire, hitting Fujiwara ten times in a few minutes, disabling both her after turrets and setting the deck on fire. Further hits caused a loss of pressure in boiler room four. As soon as the USS Montpellier and Denver joined the battle, they scored multiple hits on Chichibu. San Francisco then bracketed Aoba, landing five accurate hits on her port side, disabling the 120mm guns and starting fires near the torpedo launchers. With the tide of the battle clearly towards the American side, Fujiwara's captain ordered the fleet to retreat. As escorting destroyers made smoke all cruisers reversed course and made as much speed they could to leave the battle area. Kinugasa's survivors were hastly transferred on the destroyer Utsuho wich left last making flank speed while under fire from the entire American fleet. Kinugasa rolled over and sank with 511 dead shortly after.
After retreating to Rabaul the ship were given temporary repairs and thens teamed back to Koko home waters. With the eception of Tenji, who miracolously escaped damage, all ships had suffered serious damage during the battle. Jimmu was out of action until January 1944, Chichibu and Senjo rejoined the fleet in March and fujiware ultimately did it only by late April. In May they salied as escorts for Koko no kaigun carrier fleet during the indecisive battle of Laysian. Between May and September all ships recieved their main wartime refit: most of the portholes were sealed off, and anti-aircraft command post was added on top of the compass bridge (except on Jimmu wich already had since completion), Type 13 and Type 21 air-search radars and Type 22 surface search radars were fitted (Except the Type 21 on Jimmu already fitted) and the anti-aircraft suite was vastly increased, totaling at least 50 guns for each ship. The rangefinders from n°1 turret were also removed (except from Jimmu, which was altready completed without it). All five took part in the second Battle of Midway, during which the Kokoan carriers Inuwashi, Ahodori and Tobuio were sunk.
On November 13th 1944, Tenji was traveling between Toumachi and Midway for a supply run toghether with four destroyers when she was hit by three torpedoes from the USS Sivlersides. The cruiser immediately took on water and developed a 22° list to port, in a little mroe than six minutes Tenji rolled on her side and sank, taking 238 men with her.
At the time of Tenji's sinking, the last of the sixth sister was still undergoing her fitting out at Toumachi Naval Arsenal. Nintoku, the last unith of the class, had been laid down in 1941 and launched in 1943, but her completion had been delayed by design changes and by building priority given the Destroyer and escor ships production. Compared to ther sisters Nintoku featured a straight flare on her forecastle in order to ease construction, her stern lines were also slighly finer, she had also almost no portholes on her hull and an improved hydrophone. Displacing slightly more than her sisters, at 14.304T, Nintoku also had her armor increased to 127mm abaft the amgaszines and 140mm around the engine rooms. Barbette armor also reached 100mm. More notable, her fire control sistem had been forther updated, with a new rangefinder-director fit. This was also reflected by the rearranged bridge levels, featuing just a two level deckhouse compared to the thre-level ones of her sisters.The forward searchlight platform was placed lower than that of the other ships in order to give better firing arcs to the 25mm machine guns, which also recieved a new director for them. AA-wise, nintoku sported fifteen triple and twenty-five single 25mm machine gun mounts for a total of 70 barrels. She also carried sixteen depth charges on the faintail. Another difference was in her radar suite, She only retained the Type-22 surface search radars, while the air-search set was a kokoan built-mattress version of the thiarian R7FA obtained in early 1944 by the submarine Ki-38 during the second technology exchange between Koko and Thiaria. Nintoku also fitted the Thiarian R5CD fire-control radar for her main battery and the R12CAD fror the dual-purpose armament. Two aichi E16A replaced the Mitsubishi F1M as the main reconnaissance plane. Finally, the ship was painted in a blue-black camouflage pattern for night operations.
In further refits all the other ships recieved the Thiarian fire-control radars and variants of the Nintoku camouflage pattern, anti-air guns were further augmented, reaching a maximum of eighy-one barrels on Fujiwara: nine triple, ten twin and thirty-four single mounts. All five surviving Senjos took part in the Battle of the Philippine Sea in June 1945, testing with good results their new anti-aircraft directors. Despite the 25mm machine guns proved to be clearly lacking enough caliber and rate of fire to be satisfactory anti-air weapons, the Senjo class performed well thanks the the Thiarian fire-control, shooting down by themselves, or together with other units as high as 13 of the 49 US planes shoot down by Kokoan units during the battle.
After the Americans started their invasion of the Philippines, all five ships reached Brunei, later joining the enormous center force led by Vice Admiral Takeo Kurita. Escaping undamaged by the attempted submarine ambush made by US submarines in the Palawan passage during the night of 23 october the five Senjo class units provided air cover during the battle of the Sibuyan Sea, ultimately emerging unscathed off Samar on October 25th morning. Waiting for the Kokoan/Japanese fleet were three groups of US escort carriers -Taffy1, 2 and 3- and a squadron of co-belligerant Thiarian ships made up by two battleships, two heavy cruisers, three light cruisers and twelve destroyers. A former ally that now had to be treated like an enemy. The Fleet split and the Japanese engaged Taffy 3, while the Kokoan ones charged Taffy 2. At first the Thiarian squadron engaged the, closer, Japanese fleet, allowing Koko no Kaigun squadron to engage Taffy2 unmolested, battleship gunnery beign accurate enough to damage and further slow down the escort carriers. Kokoan cruisers then closed in and engaged the CVEs escorts. Fujiwara quickly put out of action the USS Haggard, while Hailey and Abercrombie suffered multple hits from Nintoku and Senjo's gunfire before making smoke an retreating. Chichibu opened fire on the carrier Natoma Bay shortly after. Jimmu easily disabled and sank the USS Oberrender, but not before she managed to hit the battleship Owari with one of her torpedoes. Before Taffy 1 aircraft came and started attacking the Kokoan ships, soon followed by Three destroyers and a Battleship from the Thiarian squadron, Manila Bay had been sunk by the battleship Amagi, and Fujiwara had sunk by herself with a combination of gunfire and torpedoes both USS Marcus Island and USS Kadashan bay. Thiarian battleship Athartha opened fire on the battleship Suruga, while the three destroyers charged the closest ship they had: the cruiser Chichibu. The kokan cruiser opened fire, scoring hits that heavily damaged one of the enemies, but the other two ships manged to launch their torpedoes, which were -ironically- reverse-engiinered version of the Japanese long lances, exchanged with Thiaria for the very same radars the Kokoan ships were fitted with. Despite evasive manouvers were promptly executed Chichibu was hit by three torpedoes, one of them penetrating and exploding rigth in the engine room, stopping the cruiser dead in the water. The ship became an easy target and was soon hit by five bombs dropped by Taffy 1 planes. Burning fiercely Chichibu was abandoned, strangely sinking on an even keel and taking with her all but 133 of her crew. Despite the serous losses, all of taffy 2 escort carriers except the Ommaney Bay had been sunk or heavily damaged, as it was for most of the escorts. Athartha, after inflicting serious damage on Suruga, was now beign put on the defensive by concentrating fire coming from the battleships, Amagi, Kii, Omi and Mikawa. As it appeared that Kokoan units would have been able to break the blockade and rejoin the IJN fleet the order to withdraw issued by Admiral Kurita came as a surprise. Without further ado, the Kokoan units regrouped and departed for San Bernardino strait. during the night between 25 an 26 October, the retreating fleet was intercepted by Task force 34 under the command of Admiral Willis A.Lee. Strong of the Battleships Iowa, New Jersey, Washington, Missouri, Wisconsin, Massachussets, Alabama, the Battlecruisers United States and Constitution, the recearchean battleships Resolute and Dauntless, four heavy cruiser, six light cruisers and eleven destroyers Admiral Lee tok his revenge for the defeat he suffered almost three years earlier during the second naval battle of Guadalcanal. Despite losing the Battlecruiser United States to gunfire from the Amagi and Nagato, Lee and his ships sank the Battleships, Musashi, Mutsu and Nagashiro, also heavily damaging Kii and sinking the heavy cruiser Kumano. While trying to screen Nagashiro, Nintoku was hit nine times by 16-inch shells from the USS Missouri. Burining with her rudder jammed, the Kokoan cruiser became a prime target for most of the American fleet, eventually blowing up and sinking with all hands. Fujiwara managed to hit the cruiser New Orleans twice, then torpedoed the Alabama but then she was torpedoed herself by the destroyer Porterfield, disabling her outer starboard propeller. After the disatrous battle, the battered Kokoan fleet eventually took shelter in Manila, then split. Most ships immediately set course or Koko, Senjo departed for Brunei, while Fujiwara, that suffered further hits from plane attacks on October 26, was left in Manila to repair the damage. Still under repairs, on October 29th, she came under attack from Task force 38 planes, suffering slight damage, and further delaying her departure. By November 4th, four of her eight boilers had been brought back online, allowing the ship to leave Manila and make 15knots. Just two days, off her voyage -ironically the same day Koko uprising started- Fujiwara was attacked again, this time by American Submarines. Hit by two torpedoes the Kokoan cruiser suffered all four operable boilers flooded, lost steering and developed an 11° list to starboard. Towed to Santa Cruz, Luzon, the ship now had to face further problems: as the Koko uprisings had just started every seaman had to choose his loyalty, and the Japanese troops stationed on the philippines feared that Fujiwara's crew would have joined the rebels like most of Koko no Kaigun crews had done. The cruiser thus had her entire complement temporarily interned while Japanese repair teams started working on the damaged ship, with the chance of getting her in service for the IJN eventually. Some of her crew were eventually allowed back to the ship to help with the repair works and to man the anti-aircraft guns in case of enemy attack. All this ended on November 25th 1944, when planes from the USS Ticonderoga attacked Fujiwara, hitting her with five torpedoes and four bombs. Despte refusing to die for as long as 30 minutes after suffering hits, Koko no Kaigun most succesful cruiser slowly rolled over and sank. Of her crew of 1.133 officers and men before the Battle of leyte gulf, eventually 693 returned home after the war. Of her, Admiral William "Bull" Halsey reportedly once remarked that "if there was a Japanese or Kokoan ship I could feel sorry for at all, it would be the Fujiwara"
Senjo, after reaching Brunei on november 5th, became one of the few Koko no Kaigun ships to remain loyal to Morimoto, eventually joining the IJN ranks. She then joined the cruisers Ashigara and Haguro. Here she had her aft fire-control radar removed, and both aft sets of torpedo tubes were removed to increase space for supply and troop transport. She also retained a single Aichi E13A as reconnaissance aircraft. Anti-air suite was made of four triple, eight twin and twenty-six single 25mm machine guns, for a total of 54 barrels. Together with the Haguro and Ashigara, Senjo took part in the Battle of the Andaman Sea on February 3rd 1946, during which the three ships, while facing a siperior British fleet, managed to sink the Battlecruiser Irresistible, the same ship Senjo and her sisters had battled just over four years earlier at Balikpapan. Senjo continued her job as a troop and supply transport until June 8th, while steaming between Batavia and Singapore with Ashigara and Kamikaze Senjo was hit by five torpedoes fired by HMS Trenchant, wich also damaged Ashigara with two more torpedoes. Senjo capsized and sank shortly after, taking with her 685 out of 1.153 crewmembers.
Jimmu, the only ship that managed to return to Kokoan water after the Leyte disaster, joined the rebels and surrendered to the US forces in March 1946 after Koko uprisings ended. Joining the co-beligerent fleet, Jimmu started her repairs in a devastated Toumachi Naval Arsenal. kokoan-built R12CAD and R7FA radars were fitted, and all 25mm machine guns were removed, replaced by twin 40mm/Type5 mounts, more portholes were sealed over. Works proceeded slow, so that the ship was not completed until the war was over. In 1947, Jimmu joined the newly reformed Koko Kaijou. she was repainted in standard grey, had the catapults and the torpedo mounts removed, with their hatched closed over, the aft set of searchlights was also landed. Retaining all her original electronics, with the exception of an USN machine gun director, all but six 40mm machine gun mounts were removed.
Jimmu remained in service until 1950, when the newly built cruiser Daikakuji was commissioned. She was then decommissioned and scrapped, although one of her turrets was preserved and is now on display at the Yamasaki Naval Museum, outside Koko Kaijou Naval academy, Yamasaki, Koko Island.
Ships in class: (laid down-launched-commissioned - fate)
Senjo 1934-1938-1938 - Joined the IJN 1945, Sunk 1946
Tenji 1935-1938-1939 - Sunk 1944
Fujiwara 1936-1937-1941 - Sunk 1945
Chichibu 1938-1940-1941 - Sunk 1945
Jimmu 1940-1942-1943 - Decommissioned 1950
Nintoku 1941-1943-1945 - Sunk 1945