| Honorific Prefix: | Admiral |
| Ryuichi Itaya | |
| Native Name: | 板谷 隆一 |
| Native Name Lang: | jpn |
| Honorific Suffix: | Senior Fourth Rank |
| Birth Date: | 1911 8, df=yes |
| Birth Place: | Miyaki District, Saga Prefecture, Japan |
| Death Place: | Tokyo, Japan |
| Branch: | Imperial Japanese Navy Japan Coast Guard Safety Security Force Japan Maritime Self-Defense Forcer |
| Rank: | |
| Awards: | |
Admiral was a Japanese naval officer who served in the Imperial Japanese Navy during the Second World War. After a brief stint in the post-war Japanese Coast Guard and Safety Security Force he joined the newly formed Japan Maritime Self-Defense Force (JMSDF) in 1954.
During his service in the JMSDF Itaya held a variety of command and staff positions including serving as the seventh Maritime Chief of Staff from 1966 till his appointment as the fifth Chairman of the Joint Staff Council of the Japan Self-Defense Force, a position he held from 1969 till his retirement in 1971.
Itaya was born in Nakahara Village in Miyaki District, Saga Prefecture on 20 August 1911, the second son of a farmer. His older brother was who would also go on to serve in the Japanese Imperial Navy as a naval aviator and squadron commander participating in the Attack on Pearl Harbor and the Battle of Midway until he was killed in action over the northern Kuril Islands as a result of friendly fire on 24 July 1944.
After graduating from the Itaya attended the Imperial Japanese Naval Academy from 1929 to 1932 graduating second in his class.[1] [2] After his graduation he was appointed as an ensign and posted to China for much of the Second Sino-Japanese War as part of the Shanghai Special Naval Landing Force based in the city’s port. He was promoted to Sub-Lieutenant in 1935 while part of the unit.[3] In 1937 Itaya's unit was involved in the Ōyama Incident which caused the death of the Lieutenant Isao Ōyama, an officer in the unit, and the start of the Battle of Shanghai where Itaya fought as company commander in the first month of the battle and was later reassigned to the armored cruiser Yakumo in December 1937.[4]
In 1938 Itaya was promoted to lieutenant[5] and attached to the 7th Submarine Squadron[6] where he served as Navigator aboard the submarine I-3 starting in August[7] before being reassaigned to the destroyer Kikuzuki as the ship's weapons officer.[8] The next year he was briefly reassigned as the weapons officer aboard the destroyer Shigure before attending the,[9] after graduating Itaya was assigned as the weapons officer aboard the destroyer Asashio.[10]
In 1941 Itaya served on the battleship Nagato[11] before being transferred in 1942 to the light cruiser Natori as the ship's weapons officer where he was promoted to lieutenant commander.[12] [13] In early 1943 Itaya was posted to the light cruiser Kinu as weapons officer before being transferred to the where he served as a staff officer.[14] [15] In 1944 he was transferred to the where he continued to serve as a staff officer.[16]
In April 1945 Itaya participated in the aboard the light cruiser Yahagi and survived the ship's sinking in the battle. In May he was assigned as a staff officer to the and the staff of the Combined Fleet.[17] In August he was transferred to the Imperial Japanese Navy General Staff and the Navy Ministry.[18] In September Itaya was promoted to commander and was demobilized on 30 November.[19] [20]
Starting in December 1945 Itaya served in the Hakata Demobilization Personnel Department of the . He then moved from job to job including working at a car factory and as a doorman at a hotel in Tokyo. In 1952 he joined the Japan Coast Guard with the rank of Second Class Coast Guard Officer, the equivalent of a navy lieutenant commander, where he served as director of the Training Division of the Yokosuka District Supervision Department.
In 1954 Itaya transferred to the newly established Japan Maritime Self-Defense Force with the rank of captain and made chief of Personnel Division in the General Affairs Department of the . In 1956 he was made commander of the Escort Flotilla 1 based in Yokosuka; the following year he attended the in Tokyo and the Naval War College in the United States. In 1958 he graduated from the US Naval War College and was made director of the 1st School Instructor Office at the JMSDF Staff College; the next year he was promoted to director of education at the college in 1959.
In May 1961 Itaya was made vice principal of the JMSDF Staff College until his transfer to Maritime Staff Office where he served as the Deputy Director of the Defense Department and was made rear admiral. In 1963 he was made director of general affairs at the Maritime Staff Office before being made a vice admiral and given command of the Fleet Escort Force.
In 1965 he was appointed Yokosuka District Director General, a post he served in until 30 April 1966 when he was appointed as the 7th . On 14 February 1967 during his tenure he was awarded the Commander Degree of the Legion of Merit by the United States.[21] On 1 July 1969 Itaya was made the 5th chairman of the Joint Staff Council, a position he held until his retirement on 1 July 1971.
After his retirement Itaya was an advisor to Mitsubishi Heavy Industries and in 1981 was awarded the Order of the Sacred Treasure, Second Class for his service in the JMSDF.[22] Itaya died on 1 September 1991 at the age of 80 in Tokyo and was posthumously awarded the Senior Fourth Rank of the Japanese court ranks system.[23]