Question: Viscount Yamaji Motoharu was a general in the early Imperial Japanese Army which belonged to which Empire?

Context:
Inspectorate General of Military Training
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.
Port Arthur massacre (China)
The Port Arthur massacre occurred during the First Sino-Japanese War from 21 November 1894 for two or three days, when advanced elements of the First Division of the Japanese Second Army under command of General Yamaji Motoharu (1841–1897) killed somewhere between 1,000 and 20,000 Chinese servicemen and civilians in the Chinese coastal city of Port Arthur (now Lüshunkou).
 Contemporaneous reports, including some Japanese accounts, claim that as many as 60,000 were killed, although some contemporary accounts of the war estimated Port Arthur's total population at 13,000 (6,000 excluding garrison troops).
Ōsako Naoharu
Viscount Ōsako Naoharu (大迫尚敏 , 24 December 1844 – 20 September 1927, sometimes known as "'Ōsako Naotoshi) was a general in the early Imperial Japanese Army.
 He was the older brother of General Ōsako Naomichi.
Imperial Japanese Army
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.
Imperial Japanese Army Air Service
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.
Ōshima Hisanao
Viscount Ōshima Hisanao (大島久直 , 1 October 1848 – 27 September 1928) was a general in the early Imperial Japanese Army.
Miura Gorō
Viscount Miura Gorō (三浦 梧楼 , 1 January 1847 – 28 January 1926) was a lieutenant general in the early Imperial Japanese Army.
Ogawa Mataji
Viscount Ogawa Mataji (小川又次 , 22 August 1848 – 20 October 1909) was a general in the early Imperial Japanese Army.
 He was also the father-in-law of Field Marshal Gen Sugiyama.
Takashima Tomonosuke
Viscount Takashima Tomonosuke (高島 鞆之助 , 18 December 1844 – 11 January 1916) was a general in the early Imperial Japanese Army.
Yamaji Motoharu
Viscount Yamaji Motoharu (山地 元治 , 10 September 1841 – 3 October 1897) , was a Japanese general in the early Imperial Japanese Army.
 Soldiers under his command took part in the Port Arthur massacre.

Answer: Empire of Japan