Junyo Aircraft Carrier

Commissioned in 1942, Junyo was a fleet carrier used by the Imperial Japanese Navy during World War II. She had been launched in June 1941 as the Kashiwara Maru passenger liner, but was converted into an aircraft carrier later that year, capable of carrying up to 53 aircraft (Aichi D3A dive bombers, Nakajima B5N torpedo bombers, and Mitsubishi A6M Zero fighters); these constituted the offensive weaponry of Junyo, which was also armed with twelve 127mm (5″) guns and 24mm AA guns. She was protected by a 50mm-thick belt armor.


Belonging to the Hiyo-class, Junyo first saw combat action on June 3, 1942, when her aircraft attacked Dutch Harbor, during the Battle for the Aleutian islands. Having participated in the Battle of the Santa Cruz Islands, during the Guadalcanal Campaign, in late 1942, she was seriously damaged by American SBD Dauntless dive bombers during the Battle of the Philippine Sea, on June 19, 1944. Although she was not sunk, most of Junyo’s aircraft had been shot down during this latter engagement. As a result, she was withdrawn as a frontline carrier and employed as a transport, only to be torpedoed and damaged again by an American submarine, USS Pintado SS-387, in December 1944. As a result, she was phased out of service for the rest of the war.

Power plant

2 Kampon geared steam turbines, with 2 shafts and supplied by 6 Kampon water tube boilers, delivering 57,000 hp.


Length: 220 m (240 yards)

Beam: 26.7 m (29 yards)

Draft: 8.15 m

Displacement: 25,000 tons

Speed: 25.5 knots

Range: 10,000 nautical miles

Crew: 1,200 men



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Thor is Carlos Benito Camacho, the manager and writer of this blog.