Here are three Konishi models of Japanese cruisers. Haguro, Konishi #314, depicts the cruiser around 1930 in her as built configuration with one catapult. Because the class exceeded design displacement by 10%, the initial capabilities of the ships were flawed and they were quickly sent in for a refit. By the end of 1934 all four cruisers in the class underwent modernization to add additional torpedo bulges to increase buoyancy and stability, add a shelter deck, replace fixed torpedo mounts within the hull with trainable mounts in sponsons outside the hull and 2nd catapult and replace single 120mm guns with twin 127mm mounts. This model reflects the class in the 1929 to 1934 time frame.
Mikuma, Konishi #402, depicts the original design and appearance upon completion for Mogami and Mikuma. Both were finished as light cruisers mounting fifteen 6.1-inch guns. Under the terms of the London Treaty of 1930 Japan had no further tonnage for construction of heavy cruisers and designed this class of large light cruisers. When Japan refused to ratify the London Treaty of 1935, plans were put in hand to remove the triple 6.1-inch mounts in Mogami and Mikuma and replace them with twin 8-inch mounts. Two other members of the class, Kumano and Suzya, were finished with the 8-inch guns, rather than 6.1-inch guns.
The Imperial Japanese Navy designed a whole series of light cruisers after World War One. Designed on characteristics of WWI scout and fleet cruisers, the various cruiser designs had a distinctly WWI appearance with three or four funnels, depending upon the class. Often used as leaders for destroyer squadrons, these cruiser designs served throughout World War Two. The Tenryu design is the oldest of the designs which saw significant action during World War Two. This is the Konishi Tenryu, #403. All photographs are from Chris Daley of 1250ships.com.