Question: Who was the Imperial Japanese Army officer of the official ground-based armed force of the Empire of Japan from 1868 to 1945
Context: The Indian National Army (INA; "Azad Hind Fauj" ; "lit." : Free Indian Army) was an armed force formed by Indian nationalists in 1942 in Southeast Asia during World War II.  Its aim was to secure Indian independence from British rule.  It formed an alliance with Imperial Japan in the latter's campaign in the Southeast Asian theatre of WWII.  The army was first formed in 1942 under Mohan Singh, by Indian PoWs of the British-Indian Army captured by Japan in the Malayan campaign and at Singapore.  This first INA collapsed and was disbanded in December that year after differences between the INA leadership and the Japanese military over its role in Japan's war in Asia.  It was revived under the leadership of Subhas Chandra Bose after his arrival in Southeast Asia in 1943.  The army was declared to be the army of Bose's "Arzi Hukumat-e-Azad Hind" (the Provisional Government of Free India).  Under Bose's leadership, the INA drew ex-prisoners and thousands of civilian volunteers from the Indian expatriate population in Malaya (present-day Malaysia) and Burma.  This second INA fought along with the Imperial Japanese Army against the British and Commonwealth forces in the campaigns in Burma, in Imphal and at Kohima, and later against the successful Burma Campaign of the Allies. Yasuhide Kurihara (栗原 安秀 , Kurihara Yasuhide , 17 November 1908 – 12 July 1936) was an Imperial Japanese Army officer who was a conspirator in the February 26 Incident in 1936.  He graduated in the 41st class of the Imperial Japanese Army Academy in 1929. The Inspectorate General of Military Training (教育総監部 , Kyoiku sokanbu ) was responsible for all non-military aviation training of the Imperial Japanese Army.  It was headed by an Inspector general who was responsible for overseeing technical and tactical training, and who reported directly to the Emperor of Japan via the Imperial General Headquarters rather than to the Army Minister or the Chief of the Imperial Japanese Army General Staff Office.  The position of Inspector-General of Military Training was thus the third most powerful position within the Japanese Army. General Prince Naruhiko Higashikuni (東久邇宮稔彦王 , Higashikuni-no-miya Naruhiko Ō , 3 December 1887 – 20 January 1990) was a Japanese imperial prince, a career officer in the Imperial Japanese Army and the 30th Prime Minister of Japan from 17 August 1945 to 9 October 1945, a period of 54 days.  An uncle-in-law of Emperor Hirohito twice over, Prince Higashikuni was the only member of the Japanese imperial family to head a cabinet and was the last general officer of the Imperial Japanese military to become Prime Minister.  He was the founder of the Chiba Institute of Technology. Dai-gensui (grand marshal; literally "great marshal" (大元帥 ) ) was the highest rank of the Greater Imperial Japanese Army and the Imperial Japanese Navy from the 1870s to 1945, when the Empire of Japan was dissolved.  The rank was only ever held by the Emperor of Japan as commander-in-chief of the Empire's Armed Forces and, separately, the highest ranking officer in each of the Armed Services.  The rank was equivalent to a "generalissimo" or general of the armies and admiral of the navy, being a six-star rank senior to the rank of "gensui" ("marshal").  It formally became obsolete in 1947 when the Imperial Japanese armed forces were abolished. Hirō "Hiroo" Onoda (小野田 寛郎 , Onoda Hirō , 19 March 1922 – 16 January 2014) was an Imperial Japanese Army intelligence officer who fought in World War II and was a Japanese holdout who did not surrender in 1945.  After Onoda spent 29 years holding out in the Philippines, his former commander traveled from Japan to personally issue orders relieving him from duty in 1974.  He held the rank of second lieutenant in the Imperial Japanese Army. Morihiro Higashikuni (東久邇 盛厚 , "Higashikuni Morihiro" ) , formerly Prince Morihiro (盛厚王 , Morihiro Ō , 6 May 1917 – 1 February 1969) was an Imperial Japanese Army officer who was a member of a cadet line of the Japanese imperial family and husband of the Emperor Hirohito's eldest daughter. The Imperial Japanese Army (IJA; 大日本帝國陸軍 "Dai-Nippon Teikoku Rikugun"; "Army of the Greater Japanese Empire") was the official ground-based armed force of the Empire of Japan from 1868 to 1945.  It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of War, both of which were nominally subordinate to the Emperor of Japan as supreme commander of the army and the navy.  Later an Inspectorate General of Aviation became the third agency with oversight of the army.  During wartime or national emergencies, the nominal command functions of the emperor would be centralized in an Imperial General Headquarters (IGHQ), an ad-hoc body consisting of the chief and vice chief of the Army General Staff, the Minister of War, the chief and vice chief of the Naval General Staff, the Inspector General of Aviation, and the Inspector General of Military Training. The Imperial Japanese Army Air Service (often called the Imperial Japanese Army Air Force (大日本帝國陸軍航空部隊 , Dainippon Teikoku Rikugun Kōkūbutai ) (IJAAS or IJAAF), was the land-based aviation force of the Imperial Japanese Army.  As with the IJA itself, the IJAAS was developed along the lines of Imperial German Army Aviation so its primary mission was to provide tactical close air support for ground troops while maintaining a limited air interdiction capability.  The IJAAS also provided important reconnaissance support for the Army.  However, the Army Air Service usually did not control the light aircraft or balloons deployed and operated by the IJA artillery battalions as spotters or observers.  Although the Army Air Service engaged in strategic bombing of enemy cities such as Shanghai, Nanking, Canton, Chongqing, Rangoon, and Mandalay, this was not its primary mission, and it lacked the heavy strategic bombers as were later deployed by the United States Army Air Forces. Yasuhito, Prince Chichibu (秩父宮雍仁親王 , Chichibu-no-miya Yasuhito Shinnō , 25 June 1902 – 4 January 1953) , also known as Prince Yasuhito, was the second son of Emperor Taishō, a younger brother of the Emperor Hirohito and a general in the Imperial Japanese Army.  As a member of the Imperial House of Japan, he was the patron of several sporting, medical, and international exchange organizations.  Before and after World War II, the English-speaking prince and his wife attempted to foster good relations between Japan and the United Kingdom and enjoyed a good rapport with the British Royal Family.  As with other Japanese imperial princes of his generation, he was an active-duty career officer in the Imperial Japanese Army.  Like all members of the imperial family, he was exonerated from criminal prosecutions before the Tokyo tribunal by Douglas MacArthur.
Answer: Morihiro Higashikuni