Background
The decisive defeat of the Russian Baltic Fleet
by the Japanese Combined Fleet at the Battle of Tushima in 1903 helped
usher in several decades’ adherence by the Imperial Japanese Navy to the
idea of a decisive single naval battle deciding the outcome of a war. Subsequent
Japanese naval doctrine was built upon this view, with a titanic battle
between fleets of battleships deciding the outcome of that war. The Washington
Naval Treaty of 1922 served to alter their means of achieving such a victory,
though not the goal itself.
The treaty halted all battleship construction for
ten years, as well as setting ratios of capital ships between the signatories.
As such, Japan found herself at a disadvantage given the 5 (US):5 (UK):3
(Japan) ratio in battleships. To help make up for her quantitative battleline
disadvantage, Japan turned to a relatively unregulated category, that of
cruisers.
Cruisers were not limited by ratios or an overall
tonnage allowance, only that of an individual ship tonnage limit of 10,000tons
and a main battery no bigger than 8 inches/20.3cm. Japan turned her focus
towards building cruisers with maximized armament to supplement the battleline.
Her naval doctrine evolved to include the cruisers as part of an advance
force to help whittle down an enemy fleet prior to engagement by the battleline.
They would do so with high speed, a heavy main battery and torpedoes, and
preferably at night.
Design
At the time of the treaty, the Japanese had already
embarked on an advanced cruiser design utilizing a 20.3cm (8”) battery,
but on a lighter 7,500ton hull which allowed a broadside of only six 20.3cm
mounts. The larger gun, plus surface launched torpedoes, classified the
design as the Type “A” or first class, cruisers for the Japanese. Two such
ships entered service in 1926, known as the Furutaka class. An additional
two ships, the Aoba class, were an improved design on the same size hull.
These entered service in late 1927.
A new class of four vessels was then designed to
take advantage of the new treaty’s 10,000ton hull limit. These were known
as the Myoko class and entered service in 1928-29. Their design was meant
to maximize the armament that could be carried on a 10,000ton hull. The
main battery was increased to ten 20.3cm mounts carried in five twin turrets.
Originally designed without a torpedo armament, subsequent modernizations
eventually included four triple torpedo launchers. Armor protection was
greatly improved, along with the inclusion of an anti-torpedo belt. The
powerplant was also increased in power, as was the ship’s range.
When built, these ships carried the heaviest armament
of any cruiser class yet built. However, the ships were overweight by approximately
10% at 11,633 tons (standard load) and 14,980 tons (full load), mostly
a consequence of attempting to place too much in the way of arms, armor
and equipment on a treaty restricted hull. The extra weight affected their
sea-keeping abilities, along with range. The accommodations for the crew
were also cramped.
A follow-up class was designed to address the shortcomings
of the Myokos. Known as the Takao class (and consisting of sisters Takao,
Atago, Maya, and Chokai), these ships were approximately the same size
as the Myokos, with a hull 668.5ft. long and 62ft wide as built, and having
a displacement of approximately 12,000tons standard and 15,000 tons at
full load. The Takaos retained the same main gun battery and layout as
the Myokos, but also with improved features and habitability. They entered
service in the early 1930s.
Their bridges were enlarged to accommodate fleet
command and control functionality. The bridge was also moved slightly aft
to reduce the length of the armored citadel. Their hull armor was strengthened
with the use of Ducol steel instead of HT steel and slightly thickened
as well. This was particularly true in the areas surrounding the magazines.
Their rotating twin, four 61cm torpedo batteries were located aft to reduce
potential damage from possible induced explosions. Two catapults for reconnaissance
aircraft were also installed.
Still, this new class was also about 10% overweight,
despite the use of the Ducol steel armor, some electric welding and use
of aluminum in the bridge structures. The large bridge structures added
some degree of instability as well, necessitating the addition of a few
hundred tons of ballast. The Myokos had not yet run their trials when most
of the design work for the Takaos had been completed, so the issues with
weight were not yet completely understood.
All the Takao sisters underwent a refit during
1936 in the wake of the 4th Fleet incident. Their hulls were strengthened
considerably, and minor improvements were made to their masts, fittings,
searchlights and light armaments. In 1937, adjustments were also made to
their fire controls to reduce the dispersions of their main battery salvos.
An extensive modernization was planned for the
class in the 1938-1941 timeframe. Among the planned steps: a reduction
in the size of the bridge to reduce top-weight, the addition of hull bulges
to improve stability, torpedo protection and longitudinal hull strength,
improvements to the powerplant, living quarters, communication facilities/equipment
and flooding/counterflooding abilities, and the modernization of the antiaircraft
armaments, torpedo armaments (increased from two to four per mount), fire
controls, and aircraft handling facilities, as well as the installation
of a new tripod foremast with improved RDF equipment. Upon completion of
the improvements, the Takaos would remain the largest cruisers in the IJN.
Takao was modernized at the Yokosuka Navy Yard
between May,1938 and August,1939. Atago was modernized between April,1938
and October,1939, though her modernization was split between Maizuru Navy
Yard (hull and bridge) and the balance of work performed at Yokosuka. Modernizations
for Chokai and Maya were planned for 1941, after modernizations for the
Myokos and the Mogamis were completed.
However, the run-up to war required all work to
be completed by June 1941. Six months were available for work but considered
impractical given the scope of proposed changes. So, the modernizations
for Maya and Chokai were postponed, and a small refit of their torpedo
and AA armaments took place instead, along with an upgrade to their catapults.
All the sisters received incremental refits throughout
the war, mostly to do with increased AA, improved hull integrity and radar
installations. Maya would notably receive an extensive modernization and
refit as an AA cruiser after incurring extensive bomb damage in 1943.
History
Takao is one of the more famous ships of the Imperial
Japanese Navy, both as name ship of her class, and in her own right. She
was laid down on April 27, 1928, and commissioned on May 31, 1932. All
four sisters were commissioned within a three-month interval and collectively
designated as Cruiser Division (Sentai) 4. All would train together throughout
the 1930s, excepting those times when the sisters underwent refits or modernization.
Additionally, they jointly supported landings near Shanghai during the
start of the Sino-Japanese war in 1937, as well patrol the waters off northeast
China.
At the outset of the Pacific War in late 1941,
Takao and Sentai 4 participated in the landings in the Philippines, then
spent much of February and March 1942 operating in the waters off the Netherlands
East Indies out of Palau and subsequently, Staring Bay. From there, Takao
helped intercept Allied shipping trying to escape as the Japanese overran
those islands. She sank multiple merchant ships as well as several lighter
naval units from the Allied ABDA forces.
She returned to Yokosuka in mid-March 1942 and
received a light refit, including additional 25mm AA guns and the replacement
of her secondary battery of four 12cm mounts with four unshielded, twin
12.7cm mounts. Still at Yokosuka in late April, she sortied in the company
of Maya and Atago as part of an unsuccessful pursuit of USN TF-16 (the
Doolittle Force) that had bombed Japan, using B-25 bombers flown from the
deck of the carrier Hornet. In early May, she and Maya rescued crew from
the sinking seaplane tender Mizuho, torpedoed by USS Drum off the coast
of Japan.
In late May, Takao and Maya joined with the Northern
Force for the successful attack on Dutch Harbor and the capture of Attu
and Kiska Islands in the Aleutian Islands in early June. Both ships returned
to northern Japan, then sortied again as a convoy escort for a resupply
mission to those same islands. They subsequently returned to Japan.
In early July, Chokai was detached from Sentai
4 to act as flagship for the newly formed 8th Fleet, charged with operations
in the South Pacific. After the invasion of the island of Guadalcanal by
American Marines in early August, the other three sisters of Sentai 4 advanced
to the fleet anchorage at Truk Atoll along with other heavy elements of
the fleet. They were staged at Truk as part of a larger plan to retake
Guadalcanal.
In mid-August, the Japanese initiated their plan
by sending a heavily escorted reinforcement convoy to Guadalcanal from
Truk. On the 21st, three Japanese task forces departed as well in support.
One was a carrier group, the other two were surface forces looking to entrap
and destroy elements of the US fleet after the carriers had neutralized
any interference from US carriers and land-based air assets utilizing a
crude airstrip known as Henderson Field on Guadalcanal. Sentai 4 was part
of the Japanese “Advance Force”.
In what is now known as the Battle of the Eastern
Solomons on August 24-25, only the Japanese carrier group and ships of
the Reinforcement convoy engaged American forces. The Japanese lost a light
carrier, a destroyer, and several transports, while suffering considerable
damage to a fleet carrier, a light cruiser and a seaplane tender, along
with the loss of many aircrews. A US fleet carrier was heavily damaged,
but air crew losses were low. Neither Takao nor her sisters saw any action.
All Japanese fleet elements returned to Truk. There
were several operational sorties from Truk throughout September for Sentai
4 and the Japanese fleet, but without any consequential actions or engagements.
That changed in October when Takao and Sentai 4 sortied with the Japanese
fleet as part of a new operation to retake Guadalcanal. The ensuing confrontation
is known as the Battle for the Santa Cruz Islands.
Again, Sentai 4 was part of a large surface task
force. Also again, the battle was primarily a clash between opposing carrier
forces, with significant damage and losses to both sides. Losses were high
on both sides regarding carrier air crews, but more so for the Japanese.
More importantly, the Japanese effort failed short of retaking Henderson
Field on Guadalcanal; the ownership of the airfield now acknowledged as
being the key to success for either side. Sentai 4 again failed to see
any action.
Once more, the Japanese fleet returned to Truk.
Still another attempt to retake the field was planned for November. Various
heavy units of the fleet, including Maya but not Takao or Atago, participated
in several nighttime bombardments of Henderson Field to destroy American
air forces based there. These were only momentarily successful, but they
did help set the stage for several battles over several days that took
place in mid-November. These encounters became known as the Naval Battles
for Guadalcanal.
A first clash between IJN and USN forces occurred
on the night of November 12-13th, in which ships engaged each other at
very close range for almost 40 minutes. The outcome was costly, yet indecisive.
The Japanese lost one battleship and two destroyers in this encounter,
with many other IJN ships suffering various amounts of damage. In turn,
the American lost two light cruisers and four destroyers, plus several
of their remaining ships incurring various amounts of damage.
This first round had not included any members of
Sentai 4, but the following night, Maya returned to bombard Henderson Field
in the company of heavy cruiser Suzuya while sister Chokai, heavy cruiser
Kinugasa, and several destroyers acted as a covering force and distant
escort for a large group of transports headed to Guadalcanal with troop
reinforcements. The night’s bombardment proved ineffective because the
following morning, surviving aircraft from Henderson Field, in conjunction
with aircraft from the carrier Enterprise, inflicted considerable damage
and loss upon this cruiser force as well as the transport force. Kinugasa
was sunk and Maya was moderately damaged by a dive bomber that inadvertently
crashed into her,
Subsequently, Atago and Takao, along with the battleship
Kirishima, two light cruisers and eleven destroyers were tasked with one
more bombardment of Henderson Field on the successive night of November
14-15. In doing so, they clashed yet again at close range with an ad hoc
USN force of two battleships and four destroyers similarly tasked with
preventing the bombardment by the Japanese.
Despite damaging one of the American battleships
and sinking three destroyers, the Japanese were again denied the opportunity
to eliminate or retake Henderson Field. They also lost Kirishima and a
destroyer, while Atago incurred light damage. Atago and Takao did score
several gunfire hits of multiple calipers upon the first US battleship
(South Dakota) but missed in their attempts to torpedo the second USN battleship
(Washington).
Afterwards, Sentai 4 retired toward Truk with the
remaining IJN forces. Takao and Atago eventually returned to Kure, Japan
at the end of November for a short refit.
In January 1943, Takao returned to Truk, eventually
participating as part of the supporting forces accompanying the successful
evacuation of Guadalcanal by Japanese destroyers over several nights in
early February. Afterwards, she remained at Truk with Atago and other heavy
elements of the Fleet until July.
Takao and Atago returned to Yokosuka at the end
of July for further refits and some upgrades. Among them were the addition
of two triple 25mm AA mounts and windshields for the compass bridge level.
More significant was the addition of a Type 21 air search radar atop the
foremast. Within the foremast, the RDF room was converted to a radar monitoring
compartment and the RDF monitoring function moved within the bridge.
Takao returned to Truk in August with other heavy
elements of the fleet. September and October were spent mostly at Truk,
excepting some sorties with the fleet in attempts to intercept various
American task forces as they conducted raids on Wake and various other
movements.
On November 1st, American amphibious forces invaded
the island of Bougainville, which was further up the Solomons Islands chain
to the northwest from Guadalcanal. The Japanese reacted immediately, sending
troop transports and a covering cruiser/destroyer force. The Japanese forces
ran into a similar USN cruiser /destroyer task force, which inflicted losses
and damage to the Japanese with little of their own. This encounter, the
Battle for Empress Augusta Bay, also denied the Japanese the opportunity
to land their reinforcements.
A larger, more powerful Japanese force including
Takao, Atago, and Maya of Sentai 4, plus four other heavy cruisers, three
light cruisers, and eleven destroyers were gathered at Truk for another
attack against the American forces on and around Bougainville. This force
departed Truk on the 3rd and after a quick 800-mile trip, entered Rabaul’s
harbor around 6AM, November 5th. Several of the ships proceeded to refuel
from tankers already stationed at Rabaul.
As a means of forestalling this new force, the
US Navy took a very serious, calculated risk and sent two aircraft carriers
(the fleet carrier Saratoga and the light carrier Princeton) to attack
this cruiser/destroyer force while at Rabaul. Around noon that same day
of November 5th, 97 US-carrier based aircraft from this carrier group attacked
the Japanese cruiser force in Rabaul Harbor. An hour later, a small group
of land-based B-24s of the US Fifth Air Force made a follow-up attack as
part of a coordinated effort to inflict maximum damage upon the Japanese.
Five of the seven heavy cruisers were damaged,
four (Takao, Atago, Maya, and Mogami) badly enough to warrant a return
to Japan. A light cruiser and three destroyers were also damaged. Takao
was hit by two 500lb. bombs near numbers one and two turrets. 23 men in
turret number one were killed, and her hull holed below the waterline.
Accompanied by Atago (three near missed bombs also holed her below the
waterline and killed 22 men), she returned to Yokosuka Naval Yard for repairs,
arriving on November 15th.
During Takao’s time in drydock, her battle damage
was repaired, she had a refit and underwent some modifications. Her watertight
integrity was improved with the sealing of her lower row of portholes.
She saw the addition of eight single 25mm AA mounts and a Type 22 surface
search radar was fitted to the top of her bridge superstructure. It was
also likely at this time that a Type 93 Mod 2 hydrophone was installed
up forward under the waterline. Atago’s refit was identical.
Repairs were completed on January 18, 1944. Takao
sailed for Truk in the company of several ships, but she and destroyer
Tamanami were diverted to assist the escort carrier Unyo. Unyo’s bow had
been lost to a torpedo hit, with damage compounded by rough seas. With
the assistance of other destroyers warding off US subs, Unyo was successfully
escorted back to Yokosuka.
Takao departed again, this time for Palau, arriving
on February 20th. There, she joined with Sentai 4 sisters Atago and Chokai,
along with Sentai 5’s Myoko and Haguro. Collectively, they conducted training
exercises. Sentai 4 was also transferred administratively to Admiral Ozama’s
First Mobile Fleet.
Both Sentai 4 and 5 departed Palau on March 29th,
accompanied by several escorts, to join the main fleet (now called the
First Mobile Fleet) at its new anchorage at Lingga Roads, Singapore. They
stopped enroute at Davao, Philippines. Departing Davao, the cruiser force
was attacked by US submarines, but all torpedoes were avoided. This force
arrived at Lingga on Apil 9th. Between that date and May 11, Takao and
Sentai 4 conducted training and simple maintenance, as did all the other
elements of the fleet. In the meantime, sistership Maya had rejoined Sentai
4 on May 1st, resulting in the Sentai being fully constituted.
The entire fleet moved again to Tawi Tawi, an anchorage
off Borneo’s Tarakan Island which adjoined the Philippines Tawi Tawi Islands
group, arriving on May 13th. It did so to be closer to fuel supplies and
a potential fleet action. The fleet action came about a month later, when
the First Mobile fleet sortied on June 13th to interdict American forces
planning to invade Saipan and the Marianas Islands. The ensuing battle
was called the Battle of the Philippine Sea.
The Japanese fleet sortied in three task forces,
each built around a core of three aircraft carriers. Sentai 4 sortied with
the task force known as the Vanguard Force. This group, with three light
carriers and a heavy escort of four battleships, eight heavy cruisers,
one light cruiser and seven destroyers, was placed 100 miles in front of
the two main carrier task forces as an intercept force.
Fleet combat took place between June 19 – 20th.
The battle was a disaster for the Japanese. Three fleet carriers and three
fleet oil tankers were sunk, along with several submarines. Worse, Japan
lost about 350 carrier-based aircraft and another 100+ land-based aircraft.
Still worse was the loss of the large number of air crews. American losses
were about 110+ aircraft and associated air crew. The battle essentially
eliminated the Japanese carrier force as a viable fighting force. Sentai
4 did not directly engage in any action.
The First Mobile Fleet returned to Japan where
both Takao and Atago underwent another refit at Kure during the last week
of June. This refit lasted until early July. Four more triple 25mm and
twenty-two single 25mm AA mounts were added to Takao’s AA suite. A Type
13 air search radar was fitted to the aft portion of her foremast. Atago’s
refit was again identical to Takao’s.
Takao and Atago departed Kure on July 8th for Singapore,
arriving there on the 16th. For some unclear reason, both ships went back
into drydock at Singapore at the end of the month. Coming out of drydock
after a few days, both ships headed to the Lingga anchorage. Both sisters
circulated between Lingga and Singapore while focused on training until
mid-October.
Aware of American intentions to invade the Philippines,
the Japanese fleet, Sentai 4 included, sortied for Brunei on the 18th,
arriving on the 20th, where all ships refueled. The Japanese again divided
their fleet into three groups. Sentai 4 was included as part of the Center
Force, a very powerful surface group including five battleships, ten heavy
cruisers, two light cruisers and fourteen destroyers. The Center Force’s
orders were to attack and destroy the American landing forces headed for
the island of Leyte.
All the Japanese forces sortied again on the 21st
for battle. The Center Force’s intent, under Admiral Kurita, was to pass
east through the Sibuyan Sea, then traverse the San Bernando Strait, exit
into the Philippine Sea and turn south to hit the landing beaches. But
first, to get to the Sibuyan Sea, the force had to pass through the Palawan
Passage, which is an open, deep-water channel to the west of Palawan Island.
Unfortunately, Sentai 4 faired quite poorly during
this passage. Two US submarines, Darter and Dace, were on patrol in this
area to scout for any Japanese naval force that might be sent to the Philippines
to attack the landings. They sighted the Center Force, radioed several
position reports back to the US fleet, and then raced along the surface
during the night to gain an attack position.
On the morning of October 23rd, the Center Force
was passing through the Palawan Passage when Atago was hit by four torpedoes
from Darter around 5:30AM. She sank shortly thereafter. Maya was hit about
20 minutes later by another four torpedoes from Dace. Maya, too, sank very
quickly. In between these two incidents, Takao was struck by two torpedoes
on the starboard side from Darter. No other Japanese ships were attacked,
and the rest of the Center Force steamed on to confront the US fleet at
the Battle of the Sibuyan Sea the next day and finally at the Battle off
Samar on the 25th, where Japanese losses were heavy, and the mission had
to turn back. The losses included the last of Sentai 4’s sisters, Chokai.
In Takao’s case, the two torpedoes struck aft,
in the vicinity of the aftmost bank of torpedo tubes and again further
aft along the fantail. Boiler rooms three and four were severely damaged,
and Takao lost her outermost starboard propeller shaft. The inboard shaft
was damaged, as was her steering. 33 men were killed and another 30 injured.
Takao came to a halt and was unable to resume headway until 2100 hours,
first making a speed of 6 knots and then gradually increasing to 11 knots.
Steering was problematic using a jury-rigged rudder and destroyers Naganami
and Asashimo had to escort her back to Brunei, arriving back there on October
25th.
After some emergency repairs at Brunei, Takao limped
back to Singapore by November 11th. She entered drydock there in early
January,1945 but the hydraulic steering pump could not be effectively repaired.
Further attempts were made, including additional repairs to the rudder,
in the hope of having Takao be able to return to Japan but these were also
in vain. In March, the decision was made for Takao to remain in Singapore
to help defend the island.
Her damaged stern was removed around frame 337
(between the aftmost propellers and the rudder) and emergency waterproofing
measures applied to the remaining frame. She was then permanently moored
as a floating AA battery. Camouflage paint was applied and non-essential
personnel removed from the ship and placed ashore. Some of her 25mm AA
were also removed and relocated to land-based emplacements.
By summer, her presence in the harbor (along with
the similarly marooned and moored heavy cruiser Myoko) was considered a
potential threat to pending efforts by the British to retake Singapore.
Though her actual material condition was unknown to the Allies, the potential
destructive power of her main batteries could not be ignored. Accordingly,
the Royal Navy dispatched midget submarines with limpet mines and explosive
charges to damage both cruisers.
On July 30-31, the British midget submarine XE3
managed to penetrate Singapore Harbor and attach several limpet mines to
Takao’s hull. The subsequent explosions damaged the hull below the waterline,
flooding several compartments, but without any injuries to Takao’s crew.
A second midget submarine was unable to reach Myoko to attack.
Despite the damage, Takao remained fundamentally
operational, with working boilers and generators. She remained in this
condition until officially surrendered to the British in Singapore on September
21, 1945. Most of her crew were then moved ashore off the ship, but about
150 crew were retained aboard to keep the ship somewhat operational.
Eventually, Takao was taken over by the Royal Navy
and a decision made to scuttle her. On October 27, 1946, Takao was towed
into the Straits of Malacca and explosives placed on her hull bottom. In
the late afternoon of the 29th, her Kingston valves were opened. Around
6:30PM, the explosives were set off. As she settled, the light cruiser
HMS Newfoundland opened fire to help speed her demise. Takao sank stern
first shortly thereafter, joining Myoko on the bottom, as Myoko had been
scuttled in early July. Takao was struck from the Navy Register shortly
thereafter. |