Arima was born in Ijuin village, Kagoshima prefecture. He graduated from the 43rd class of the Imperial Japanese Naval Academy in 1915. He was ranked 33rd in a class of 96 cadets. As a midshipman, he was assigned to the cruiser on its 1915 long distance navigational training voyage from Sasebo to Chemulpo, Dairen, Chinkai, Maizuru and Toba. He stayed with Iwate on its cruise the following year to Hong Kong, Singapore, Fremantle, Melbourne, Sydney, Wellington, Auckland, Jaluit Atoll, Ponape, and Truk. On his return, he was commissioned as an ensign assigned to the battleship. As a lieutenant, he subsequently served on the destroyer, battleship and, destroyer, cruiser, and battleship. He returned to school, graduating from the 26th class of Naval War College in 1928 and was promoted to lieutenant commander. After serving as chief gunnery officer on the battleship and the cruiser, Arima received his first command on 1 December 1937, the converted seaplane tender. He was also promoted to captain the same day. Arima oversaw several naval air force bases in Japan from 1938–1942, and was then posted as captain of the aircraft carrier on 25 May 1942. While on Shōkaku, he was in the Guadalcanal campaign, the Battle of the Eastern Solomons, the Battle of the Santa Cruz Islands, and the Naval Battle of Guadalcanal. s, 30 October 1944 Arima was promoted to rear admiral on 1 May 1943. He was given a combat command on 9 April 1944, and was assigned the 26th Air Flotilla, based at Clark Air Base, on Luzon, in the Philippines. After the Battle of Leyte Gulf, at some date between 13 October and 26 October, Arima personally led an air attack against U.S. Navy Task Force 38 in the Aerial Battle of Taiwan-Okinawa. Before taking off in a Mitsubishi G4M "Betty" twin-engine bomber, he allegedly removed his rank and other insignia, and declared his intention to not return alive. Although Arima indeed did not return, and some damage was caused to the Essex-class aircraft carrier, it is not clear that the damage was from a planned suicide attack, and some accounts state that none of Arima's formation reached their targets. Another source claims that the first kamikaze attack happened a month earlier. On 12 September 1944, a group of Army pilots of the 31st Fighter Squadron located on Negros Island decided to launch a suicide attack the following morning. First Lieutenant Takeshi Kosai and another sergeant were selected. Strapping two bombs onto two fighters, they took off on 13 September before dawn, determined to crash into aircraft carriers. They never returned, but there is no record of an enemy plane hitting an American ship on that day. In the aftermath of the battle, however, Arima was officially credited by the Imperial Japanese Navy with introducing the use of the kamikaze'' attack, and he was publicized as a hero in the government-controlled Japanese press. Arima was posthumously promoted to vice admiral. His cenotaph is at the temple of Kozai-ji in his home town of Hioki, Kagoshima.
Notable positions held
Secondary Gunnery Officer, Haruna - 10 December 1928 – 5 September 1929
