two 8 cm/40 3rd Year Type naval guns and two 6.5 mm machine guns. Provision was made for 48 naval mines. A major difference from the Kuma class was in the configuration of the bridge, which incorporated an aircraft hangar. Initially, a platform was mounted above the No.2 turret, extending over the forward superstructure below the bridge. This was later replaced by an aircraft catapult. Even so, the arrangement proved unwieldy, and the catapult was moved to the rear of each ship, between the No.5 and No.6 turrets during retrofits in 1929-1934. The silhouette of the bridges varied somewhat from ship to ship, as Abukuma has a rangefinder located on top of the bridge, whereas Nagara and Isuzu had instruments, Natori had a , and Yura and Kinu were equipped with instruments. In service modifications Near the start of World War II, Abukuma and Kinu were scheduled to be fitted as flagships for destroyer squadrons, with the new Type 93 torpedoes. However, due to shortages, only Abukuma received the twin quadruple-mount launcher as planned, and her forward launchers were removed. After the start of the war, each of the vessels in the Nagara class was modified and upgraded, especially to enhance anti-aircraft capabilities, but no two vessels were modified in the same way. To keep weight within design limits, the catapults were removed, and on almost all vessels, the No.5 and No.7 turrets were replaced by a twin-mount 12.7 cm/40 Type 89 naval gun and additional single and triple-mount Type 96 25 mm AA guns, wherever room permitted, supplemented by 13-mm machine guns. From 1943-1944, the five surviving ships in the class received radar. Isuzu was the only cruiser which underwent conversion into a dedicated anti-aircraft/anti-submarine cruiser. From May–September 1944, all of her main guns were removed and replaced by a total of three Type 89 twin-mounted anti-aircraft guns, with a Type 94 fire-control system added to the foremast. Her Type 96 25 mm AA guns were increased to a total of 11 triple-mounts and 17 single-mounts. Her torpedo launchers were replaced by two quadruple launchers mounted in the stern, along with two depth charge rails. She was given a complete set of the latest radar, hydrophones and sonar. Ships in class Six vessels were built in the Nagara class. None survived the Pacific War. () Built by the Sasebo Naval Arsenal and commissioned on 22 April 1922, Nagara served