Navy Academy. In this capacity, she participated six voyages in the 1920s and 1930s to Europe, North and South America, and Oceania, including a circumnavigation of the globe from August 1921 to April 1922 with Yakumo. Two of the naval cadets that participated in this cruise were Princes Kuni Asaakira and Kachō Hirotada. While in Vancouver, British Columbia, on 7 February 1925, on one of these cruises, a tugboat collided with one of the ship's boats at night, drowning 11 crewmen. In 1924, four of Izumos 12-pounder guns were removed, as were all of her QF 2.5-pounder guns, and a single 8 cm/40 3rd Year Type anti-aircraft (AA) gun was added. Refitted again in 1930–31, her torpedo tubes were removed as were all of her main deck 6-inch guns and their casemates plated over; she now carried only four 12-pounders. In 1935 her boilers were replaced by six Kampon water-tube boilers with an output of only which reduced her top speed to . She now carried of coal and of fuel oil which increased her deep displacement to China service and World War II On 2 February 1932, during the First Shanghai Incident, Izumo became the flagship of the newly re-established 3rd Fleet under Admiral Kichisaburō Nomura and arrived in Shanghai six days later. In 1934, Izumo was equipped to operate a floatplane at the Sasebo Naval Arsenal. Shortly after the beginning of the Second Sino-Japanese War in July 1937, Izumo was attacked on 14 August 1937 in a series of raids by Chinese Air Force aircraft during the Battle of Shanghai. Most of the bombs landed in the river without effect, but two bombs landed among spectators, killing hundreds. Izumos Nakajima E4N floatplane and another from the light cruiser managed to get into the air and they claimed to have shot down one Curtiss Hawk biplane fighter and a Northrop Gamma bomber. Two days later, her E4N claimed to have shot down another Hawk. Izumo was attacked that same day by a Chinese torpedo boat, but the torpedoes missed and the boat was abandoned by its crew. The ship provided naval gunfire support to Japanese troops ashore during the battle. Izumo was repeatedly attacked without effect by Chinese aircraft for the duration of the Battle of Shanghai. Still in Shanghai at the beginning of the Pacific War on 8 December 1941, Izumo captured the American river gunboat and assisted