IJN Mogami-class (full interior)

The Mogami-class were four advanced cruisers of the Imperial Japanese Navy: Mogami, Mikuma, Suzuya, and Kumano. Designed under the restrictions of the Washington and London Naval Treaties, they were officially built as light cruisers armed with 15 × 155 mm guns in five triple turrets, but from the start they were intended for later conversion to heavy cruisers.


File include:

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  java map 5 ships (Mogami/Mikuma/Kumano/Suzuya+Mogami-cv)
  
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  5 Schematic files
  

General parameters:

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    Displacement: ~13,400 tons standard; ~15,900 tons full load (after refit)
    
    

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    Length: 200 m (656 ft)
    
    

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    Beam: 20.2 m (66 ft) after reconstruction
    
    

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    Draft: ~6.2 m (20 ft)
    
    

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    Speed: 35 knots (65 km/h / 40 mph) thanks to 152,000 shp turbines
    
    

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    Range: ~8,000 nautical miles at 14 knots
    
    

Armament (after 1939–40 rebuild):

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    10 × 203 mm (8-inch) main guns (5 × twin turrets)
    
    

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    8 × 127 mm dual-purpose guns
    
    

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    12–16 × 610 mm torpedo tubes for the deadly Type 93 “Long Lance” torpedoes
    
    

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    Dozens of 25 mm AA guns (increased during the war)
    
    

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    3 floatplanes with 2 catapults for scouting and artillery spotting
    
    

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Design features & differences

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    Originally, their hulls were too light and top-heavy, causing serious stability problems. After early trials, all ships underwent strengthening, widening of the beam, and redesign of their superstructures.
    
    

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    Mogami & Mikuma had bulkier early structures, while Suzuya & Kumano were built lighter and more stable.
    
    

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    By the late war, all carried heavy AA batteries and radar.
    
    

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Operational history

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    Mogami – fought at Midway (collided with Mikuma), later heavily damaged at Leyte Gulf and scuttled in 1944.
    
    

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    Mikuma – bombed and sunk at Midway (1942) after the collision with Mogami.
    
    

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    Suzuya – participated in the Solomons and Philippines campaigns, sunk by carrier aircraft at Leyte Gulf (1944).
    
    

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    Kumano – survived multiple damages (torpedoes, bombs, shellfire) but was sunk in the Philippines late in 1944.
    
    

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The Mogami-class represented Japan’s attempt to push treaty limits to the maximum. They were fast, heavily armed, and dangerous, but their early instability showed the risks of treaty-dodging design. In WWII, they became the workhorses of the IJN heavy cruiser force, fighting in nearly every major campaign