Later, Japanese evacuation of Kiska (:ja:キスカ島撤退作戦) was also officially named Operation Ke. was the largely successful withdrawal of Japanese forces from Guadalcanal, concluding the Guadalcanal Campaign of . The operation took place between 14 January and 7 February 1943, and involved both Imperial Japanese Army (IJA) and Imperial Japanese Navy (IJN) forces under the overall direction of the Japanese Imperial General Headquarters (IGH). Commanders of the operation included Isoroku Yamamoto and Hitoshi Imamura.
The Japanese decided to withdraw and concede Guadalcanal to Allied forces for several reasons. All attempts by the IJA to recapture Henderson Field, the airfield on Guadalcanal in use by Allied aircraft, had been repulsed with heavy losses. Japanese ground forces on the island had been reduced from 36,000 to 11,000 through starvation, disease, and battle casualties. IJN forces were also suffering heavy losses attempting to reinforce and resupply the ground forces on the island. These losses, plus the projected resources needed for further attempts to recapture Guadalcanal, were affecting strategic security and operations in other areas of the Japanese Empire. The decision to withdraw was endorsed by Emperor Hirohito on 31 December 1942.
The operation began on 14 January 1943 with the delivery of a battalion of infantry troops to Guadalcanal to act as rearguard for the evacuation. Around the same time, IJA and IJN air forces began an air superiority campaign around the Solomon Islands and New Guinea. During the air campaign, a US cruiser was sunk in the Battle of Rennell Island and one of its escorting destroyers was heavily damaged by torpedo bombing. Two days later, Japanese dive bombers sank a US destroyer off Verahue and damaged another. The withdrawal was carried out in three runs on the nights of 1, 4, and 7 February by destroyers.
At a cost of one destroyer sunk and three damaged, the Japanese evacuated 10,652 men from Guadalcanal. During the evacuation 600 died and 3,000 more required extensive hospital care. On 9 February, Allied forces realized that the Japanese were gone and declared Guadalcanal secure, ending the six-month campaign for control of the island.
Background
Guadalcanal Campaign
On 7 August 1942, the US 1st Marine Division landed on Guadalcanal, Tulagi, and Florida Islands in the Solomon Islands. The landings on the islands were meant to deny their use by the Japanese as bases for threatening the supply routes between the US and Australia, and to secure the islands as starting points for a campaign with the eventual goal of capturing or neutralizing the major Japanese base at Rabaul while also supporting the Allied New Guinea campaign. The landings initiated the six-month-long Guadalcanal campaign.Hogue, Pearl Harbor to Guadalcanal, pp. 235–236.
Taking the Japanese by surprise, by nightfall on 8 August the Marines secured Tulagi and nearby islands as well as the Japanese airfield under construction at Lunga Point on Guadalcanal. The Allies later renamed it "Henderson Field". Allied aircraft operating out of Henderson were called the "Cactus Air Force" (CAF) after the Allied code name for Guadalcanal.Morison, pp. 14–15; Miller, p. 143; Frank, p. 338; Shaw, p. 18.
In response to the landings on Guadalcanal, the Japanese Imperial General Headquarters (IGH) assigned the Imperial Japanese Army's (IJA) 17th Army, a corps-sized command headquartered at Rabaul under the command of Lieutenant General Harukichi Hyakutake, the task of retaking Guadalcanal.Griffith, pp. 96–99; Dull, p. 225; Miller, pp. 137–138. Because of the threat by CAF aircraft, the Imperial Japanese Navy (IJN) was unable to use large, slow transport ships to deliver troops and supplies to the island. Instead, warships based at Rabaul and the Shortland Islands were used to carry forces to Guadalcanal. The Japanese warships, mainly light cruisers and destroyers from the Eighth Fleet under the command of Vice Admiral Gunichi Mikawa, were usually able to make the round trip down "The Slot" to Guadalcanal and back in a single night, thereby minimizing their exposure to CAF air attack. These high speed warship runs to Guadalcanal occurred throughout the campaign and were later called the "Tokyo Express" by Allied forces and "Rat Transportation" by the Japanese.Frank, pp. 202, 210–211; Morison, pp. 81, 113–114.
Using forces delivered to Guadalcanal in this manner, the IJA tried three times to retake Henderson Field, but was defeated each time.Frank, pp. 141–158, 218–246, 337–367. After the third failure, an attempt by the IJN to deliver the rest of the IJA 38th Infantry Division and its heavy equipment failed during the Naval Battle of Guadalcanal from 12 to 15 November. Because of this failure, the Japanese cancelled their next planned attempt to recapture Henderson Field.Frank, pp. 428–492; Morison, pp. 286–287.
In mid-November, Allied forces attacked the Japanese at Buna-Gona in New Guinea. Japanese Combined Fleet naval leaders, headquartered at Truk and under the overall command of Admiral Isoroku Yamamoto, felt Allied advances in New Guinea posed a greater threat to the security of the Japanese Empire than an Allied military presence in the southern Solomons. Therefore, Combined Fleet naval staff officers began to prepare plans for abandoning Guadalcanal and shifting priorities and resources to operations around New Guinea. At this time, the navy did not inform the army of their intentions in this regard.Frank, p. 499.
As December began, the Japanese experienced considerable difficulty in keeping their troops on Guadalcanal resupplied because of Allied air and naval attacks on the Japanese supply chain of ships and bases. The few supplies delivered to the island were not enough to sustain Japanese troops who, by 7 December, were losing about 50 men each day to malnutrition, disease, and Allied ground or air attacks. The Japanese had delivered almost 30,000 army troops to Guadalcanal since the campaign began, but by December only about 20,000 of that number were still alive; of those, only around 12,000 remained more or less fit for combat duty, with the rest incapacitated by battle wounds, disease, or malnutrition.Frank, pp. 493–527; Hough, pp. 364–365; Morison, pp. 324–325. The malaria rate among Japanese troops on Guadalcanal at this time was near 100% and some may have even engaged in cannibalism because of the lack of food.
The IJN continued to suffer losses and damage to its ships in attempting to keep the Japanese on Guadalcanal resupplied. One destroyer was sunk by American warships at the Battle of Tassafaronga on 30 November. Another destroyer plus a submarine were sunk and two destroyers damaged by American PT boat and CAF air attacks during subsequent resupply missions from 3–12 December. Compounding the navy's frustration, very few of the supplies carried on these missions reached IJA forces on the island. Combined Fleet leaders began telling their army counterparts the losses and damage to warships engaged in the resupply effort threatened future strategic plans for protecting the Japanese Empire.Frank, pp. 513–524; Morison, pp. 318–321; Griffith, p. 268; Toland, p. 424.
Decision to withdraw
Throughout November, Japan's top military leaders at the IGH in Tokyo continued to openly support further efforts to retake Guadalcanal from Allied forces. At the same time, lower-ranking staff officers began to discreetly discuss abandoning the island. Takushiro Hattori and Masanobu Tsuji, each of whom had recently visited Guadalcanal, told their colleagues on the staff that any further attempt to retake the island was a lost cause. Ryūzō Sejima reported that the attrition of IJA troop-strength on Guadalcanal was so unexpectedly severe that future operations would be untenable. On 11 December two staff officers, IJN Commander Yuji Yamamoto and IJA Major Takahiko Hayashi, returned to Tokyo from Rabaul and confirmed Hattori's, Tsuji's, and Sejima's reports. They further reported that most of the IJN and IJA officers at Rabaul appeared to support abandoning Guadalcanal. Around this time, Japan's War Ministry informed the IGH that there was insufficient shipping to support both the effort to retake Guadalcanal and transport strategic resources to maintain Japan's economy and military forces.Hayashi, p. 62; Griffith, p. 268; Frank, pp. 534–536; Toland, pp. 421–423.
On 19 December, a delegation of IGH staff officers led by IJA Colonel Joichiro Sanada, chief of the IGH's operations section, arrived at Rabaul for discussions about future plans concerning New Guinea and Guadalcanal. Hitoshi Imamura, commander of the 8th Area Army in charge of IJA operations in New Guinea and the Solomons, did not directly recommend a withdrawal from Guadalcanal but openly and clearly described the current difficulties involved with any further attempts to retake the island. Imamura also stated that any decision to withdraw should include plans to evacuate as many of the soldiers from Guadalcanal as possible.Griffith, p. 268; Frank, pp. 536–538; Jersey, p. 384; Hayashi, p. 62. The 8th Area Army commanded the 17th Army on Guadalcanal and the 18th Army in New Guinea (Miller, p. 337). Sejima was included in the delegation to Rabaul.
Sanada returned to Tokyo on 25 December and recommended to the IGH that Guadalcanal be abandoned immediately and all priority given to the campaign in New Guinea. The IGH's top leaders agreed with Sanada's recommendation on 26 December and ordered their staffs to begin drafting plans for the withdrawal from Guadalcanal and establishment of a new defense line in the central Solomons.Jersey, p. 384; Frank, p. 538; Griffith, p. 268; Hayashi, pp. 62–64; Toland, p. 426.
On 28 December, General Hajime Sugiyama and Admiral Osami Nagano personally informed Emperor Hirohito of the decision to withdraw from Guadalcanal. On 31 December, the Emperor formally endorsed the decision.Hayashi, pp. 62–64; Griffith, p. 268; Frank, p. 539; Toland, p. 426. During the conference with Sugiyama and Nagano, the Emperor asked Nagano, "Why was it that it took the Americans just a few days to build an air base and the Japanese more than a month or so?" (The IJN originally occupied Guadalcanal and began constructing the airfield). Nagano apologized and replied that the Americans had used machines while the Japanese had to rely on manpower. (Toland, p. 426.)
Plan and forces On 3 January, IGH informed the 8th Area Army and the Combined Fleet of the decision to withdraw from Guadalcanal. By 9 January, the Combined Fleet and 8th Area Army staffs together completed the plan, officially called Operation Ke after a mora in Japanese Kana vocabulary, to execute the evacuation.Miller, p. 338; Frank, pp. 540–541; Morison, pp. 333–334; Rottman, p. 64; Griffith, p. 269; Jersey, p. 384; Hayashi, p. 64. Imamura and Jinichi Kusaka, IJN commander at Rabaul, at first objected to the withdrawal order but accepted it on being reminded that it had the Emperor's endorsement.
The plan called for a battalion of IJA infantry to land by destroyer on Guadalcanal around 14 January to act as a rear guard during the evacuation. The 17th Army was to begin withdrawing to the western end of the island about 25 or 26 January. An air superiority campaign around the southern Solomons would begin on 28 January. The 17th Army would be picked up in three lifts by destroyers the first week of February with a target completion date of 10 February. At the same time, Japanese air and naval forces would conduct conspicuous maneuvers and minor attacks around New Guinea and the Marshall Islands along with deceptive radio traffic to try to confuse the Allies as to their intentions.Frank, p. 541; Morison, p. 340.