Aircraft / Aviation Vehicles & Artillery Infantry Arms Warships & Submarines Military Ranks Military Pay Chart (2024)
Naval Warfare

IJN Ryujo

Aircraft Carrier [ 1933 ]

Commissioned in 1933, IJN Ryujo fell victim to American forces during the Battle of the Eastern Solomons on August 24th, 1942.

Authored By: Staff Writer | Last Edited: 10/12/2022 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

The carrier arm of the Imperial Japanese Navy (IJN) prior to, and during, World War 2 (1939-1945) was the lifeblood of the Japanese war machine in the Pacific. By this time, the aircraft carrier was making its case to supplant the battleship as the capital ship in most navies. As such, considerable effort was made on the part of the IJN to ensure its survival in the coming decades and leave no doubt that the nation had risen to become a global power among the few.

Even with the Washington Naval Treaty of 1922 in place, nations like Germany and Japan skirted warpower restrictions to enact major new naval programs and bring about a second global arms race. For the IJN, this resulted in the "Ryujo", a one-off, light-class aircraft carrier whose design began as an 8,000-ton hull to remain under the Treaty's 10,000-ton limit. This approach, of course, meant that certain qualities of the ship would have to be revised to remain under the limit, thus forcing little armor protection to be installed over critical components and under decking. Originally intended to carry just 24 combat aircraft, this was increased to 48 before her construction was completed.

The warship was laid down on November 26th, 1929 and formally launched to sea on April 2nd, 1931. She was commissioned into service with the Imperial Japanese Navy on May 9th, 1933 to begin a career that lasted barely a decade. Within a year of having entered service, the warship was taken back to dock to have her stability addressed.

As built, this light carrier was given a rated displacement of 8,000 tons under standard load which could balloon up to 10,150 tons if pressed. Overall length of the vessel was 590.2 feet with a beam of 66.7 feet and a draught down to 18.2 feet. Its original hull work was clearly evident in the finished design as the carrier component, complete with straight-through / flushed flight deck space, was simply added over the existing base hull structure that retained the pointed bow and rounded stern facing.

Power stemmed from 12 x Kampon water-tube boiler units feeding 2 x Geared steam turbines developing 65,000 horsepower to 2 x Shafts astern.

Aboard was a complement of 600 men.

Armament was purely defensive in nature, as the carrier's air arm and accompanying warships would suffice in its protection. This suite consisted of 6 x 127mm Dual-Purpose (DP) twin-gunned emplacements and 12 x 132mm Anti-Aircraft (AA) twin-gunned emplacements.

As early as 1936, the vessel underwent a refit which increased displacement to 10,600 tons standard and up to 12,735 tons under load. The beam was widened by two feet and the draught increased to 23.2 feet for better sea-worthiness. The crew complement was expanded considerably to 934 men and armament was trimmed to 4 x 127mm DP twin-gunned mountings with 2 x 25mm AA twin-gunned mountings.

First-contact operations for the carrier were had during the Second Sino-Japanese War (1937-1945) against Chinese elements. From there, the carrier was a fixture of Japanese naval operations during the early portion of the Pacific Campaign in World War 2 (1939-1945), supporting offensive ground actions against the Philippines, Malaya, and into the Dutch East Indies. The vessel was then used in the Japanese invasion of the Aleutian Islands during June of 1942. Her luck eventually ran out on August 24th, 1942 when she was destroyed and ultimate sunk by American naval warplanes during the Battle of the Eastern Solomons. Her name was stricken from the Naval Register on November 10th, 1942.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.


Service Year

Imperial Japan national flag graphic
Imperial Japan

No Longer in Service.

IJN Ryujo

IJN Ryujo

National flag of modern Japan Imperial Japan
(OPERATORS list includes past, present, and future operators when applicable)
Flag Ship / Capital Ship
Serving in the fleet Flag Ship role or Capital Ship in older warship designs / terminology.

590.2 ft
179.89 m
66.7 ft
20.33 m
18.2 ft
5.55 m

Installed Power: 12 x Kampon water-tube boilers with 2 x Geared steam turbines developing 65,000 horsepower to 2 x Shafts.
Surface Speed
29.0 kts
(33.4 mph)
10,428 nm
(12,000 mi | 19,312 km)

kts = knots | mph = miles-per-hour | nm = nautical miles | mi = miles | km = kilometers

1 kts = 1.15 mph | 1 nm = 1.15 mi | 1 nm = 1.85 km
6 x 127mm Type 89 Dual-Purpose (DP) main guns (three twin-gunned turrets).
12 x 13.2mm Hotchkiss Anti-Aircraft (AA) machine guns (six twin-gunned emplacements).

Supported Types

Graphical image of a modern warship turreted deck gun armament
Graphical image of a historical warship turreted main gun armament
Graphical image of an aircraft medium machine gun
Graphical image of an aircraft automatic cannon

(Not all weapon types may be represented in the showcase above)
Up to 48 aircraft carried.

Military lapel ribbon for the Cold War period
Military lapel ribbon for early warship designs
Military lapel ribbon for the Falklands War
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Korean War
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the Attack on Pearl Harbor
Military lapel ribbon for the Russian Invasion of Ukraine
Military lapel ribbon for the Vietnam War
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2

Ribbon graphics not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective naval campaigns / operations / periods.

Images Gallery

1 / 1
Image of the IJN Ryujo
Image from the Public Domain.

Disclaimer | Privacy Policy | Cookies

2024 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content; site is 100% curated by humans.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.

©2023 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2023 (20yrs)