Kako and her sister ship Furutaka were the first generation
of high speed heavy cruisers in the Japanese navy, intended to counter
the US Navy Omaha-class scout cruisers and Royal Navy Hawkins-class heavy
cruisers.
Kako was completed at Kawasaki Shipbuilding Corporation at Kobe on 20
July 1926. Assigned to the Fifth Squadron (Sentai) from then until 1933,
she served in Japanese and Chinese waters, participating in fleet maneuvers
and combat operations off the China coast. Kako was given a major refit
in 1929–30, improving her machinery and slightly changing her appearance.
Briefly operating with Cruiser Division 6 (CruDiv6) in 1933, Kako was in
the naval review off Yokohama in late August. She went into guard ship
status in November of that year and into reserve in 1934.
In July 1936, Kako began an extensive reconstruction at Sasebo Navy
Yard, which was completed by 27 December 1937. At this time, the ship's
six single 200 mm (7.9 in) main gun turrets were replaced by three 203.2
mm (8 in) twin turrets.
In late 1941, Kako was in Cruiser Division 6 under Rear Admiral Aritomo
Goto in the First Fleet with Aoba, Furutaka and Kinugasa. At the time of
the attack on Pearl Harbor, she was engaged in support for the invasion
of Guam.
Kako participated in the Battle of the Coral Sea as an escort to the
light aircraft carrier Sh?h?, which was sunk in the same battle. Kako ended
this skirmish acting as cover for the withdrawing Port Moresby invasion
convoy. She was assigned to patrol duty until July of 1942 when in a major
reorganization of the Japanese navy on 14 July 1942, Kako was assigned
to the newly created Eighth Fleet under Vice Admiral Mikawa Gunichi and
was assigned to patrols around the Solomon Islands, New Britain and New
Ireland.
On 8 August 1942, north of Guadalcanal a three-seat Aichi E13A1 "Jake"
reconnaissance floatplane launched from Kako was shot down by an SBD Dauntless
of VS-72 from the aircraft carrier USS Wasp. This was the prelude to the
Battle of Savo Island the following day.
On 9 August, the four heavy cruisers of CruDiv 6 (Aoba, Kako, Furutaka
and Kinugasa), the heavy cruiser Ch?kai, light cruisers Tenry? and Y?bari
and destroyer Y?nagi engaged the Allied forces in a night gun and torpedo
action. At about 2300, Ch?kai, Furutaka and Kako all launched their reconnaissance
floatplanes. The circling floatplanes dropped flares illuminating the targets
and all the Japanese ships opened fire. The cruisers USS Astoria, Quincy,
Vincennes and HMAS Canberra were sunk. The cruiser USS Chicago was damaged
as were the destroyers Ralph Talbot and Patterson. Kako's gunfire hit Vincennes
in the hangar and destroyed all of her Curtiss SOC Seagull floatplanes.
On the Japanese side, Ch?kai was hit three times, Kinugasa twice, Aoba
once; Furutaka and Kako were not damaged.
On 10 August, CruDiv 6's four cruisers were ordered unescorted to Kavieng,
while the remainder of the striking force returned to Rabaul. At 0650 the
American submarine USS S-44 sighted CruDiv 6 on a track less than 900 yards
(800 m) away and fired four Mark 10 torpedoes from 700 yards (600 m) at
the rear ship in the group, which happened to be Kako. At 0708, three torpedoes
hit Kako. The first struck to starboard abreast the No. 1 turret. The other
torpedoes hit further aft, in the vicinity of the forward magazines and
boiler rooms 1 and 2. Kako had all of her portholes open, and within 5
minutes she rolled over on her starboard side and exploded as sea water
reached her boilers. At 0715, Kako disappeared bow first in the sea off
Simbari Island at 02°28?S 152°11?ECoordinates: 02°28?S 152°11?E
in about 130 feet (40 m) of water. Aoba, Furutaka and Kinugasa rescued
Captain Takahashi and most of Kako's crew, but thirty-four crewmen were
killed.
Kako was removed from the navy list on 15 September 1942.
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