My heartiest thanks to BB1987, who took the time to do the post-war versions of this class.
The last class of wartime light cruiser, the
Oyabe-class, was intended compete with the United States Navy's
Cleveland-class cruisers. Originally designed to have eighteen 6.1-inch guns in six triple turrets, the stability problems that would have produced caused the Naval General Staff to order a drastic redesign. The result was the loss of two gun turrets, bringing the ships down to twelve 6.1-inch guns in four twin turrets, on par with the
Clevelands, and the first of six ships,
Oyabe, was laid down in late October 1943. She was launched in March 1945 and commissioned in March 1946.
The original design for the
Oyabe-class ships. Note the overloaded superstructure and the near-afterthought torpedo placement.
Oyabe as completed in March 1946. The elongated hull and lines taken from most of the wartime-built CLs made for a handsome ship...the IJN's version of the USN's
Cleveland-class.
By the time the war ended in August 1946, only three of the six ships had been commissioned, with the other three in the process of fitting out. The remaining three vessels had all entered service by late February 1947, and the entire class served with distinction during the 3rd Sino-Japanese War.
The fifth ship of the class,
Takase, as she appeared in 1954, with updated radar, her secondary armament replaced with 40-mm. Bofors guns, and the seaplane facilities converted to helicopter operations.
By the mid-1950s, it was obvious that the all-gun cruiser was going to become a thing of the past, and as the
Oyabes still had quite a bit of life left in them, the Naval General Staff ordered them converted into missile cruisers, similar to the United States Navy's
Galveston- and
Providence-class cruisers.
Oyabe post-refit, in 1958. Although she retained her forward guns, she was practically a new ship from her stack aft. TALOS missile launchers took the place of her aft guns, and aircraft facilities were moved to the very stern.
The third ship of the class,
Naruse, as converted in 1960, with increased communications for use as a flagship.
The last ship of the class,
Shonai, seen in 1967, with Tartar weapons systems. Like
Naruse, she had increased communications and was used as a flagship.
As missile cruisers, the
Oyabes enjoyed long careers serving their Emperor and country, but like everyone and everything, time eventually caught up to them and they began showing their age. As such, it was decided to retire them, starting with
Oyabe herself in June 1969.
Oirase followed her in May 1970, while the other sisters aided the U.S. Navy units off Vietnam.
Takase was decommissioned in August 1973, followed by
Naruse in May 1974, and only three months later
Naruse was scrapped.
Takase followed her sister ship to the scrapyard in March 1975, and
Oyabe joined her in May of that year.
Shonai was decommissioned in May 1976, her final service being flagship to Emperor Hirohito at the Navy Day Celebrations that year. The era of the gun cruiser came to an end for the Japanese Navy when
Kurobe was decommissioned in December 1979. All the
Oyabes retained their forward turrets to the end of their service lives, and part of
Kurobe's final cruise included gunnery exercises in the Inland Sea, where she fired her 6.1-inch guns for the last time.
Oirase and
Shonai were scrapped in July 1980, but it seemed as though the Navy Department forgot about
Kurobe, for she languished in Reserve for nearly twenty years. She was in danger of being scrapped, but the citizens of Maizuru raised enough money to buy her from the Navy, and she was towed there after being removed from the Navy List, opening as Maizuru's first museum ship in early January 1999.