<p>This paper focuses on the 1918–1921 Japanese military mission to Central Asia, stationed in Urumchi, Ili (Gulja), Tarbagatay and Kashgar. Japanese General Staffs dispatched several officers to Xinjiang to support the Siberia Intervention. This paper reviews the mission’s activities and concerns on intelligence, economic interests and propaganda, especially those of the so-called ‘Japanese consul in Gulja’, Captain Nagamine.</p><p>The Japanese mission had a keen interest in the developments of the Russian Civil War in the Semirech’e and Semipalatinsk Oblasts. In Ili, Nagamine built relationships with the White Russian consul, leaders of nomads and others. Japanese officers reported activities of White Russian Cossacks in detail. Meanwhile, the Governor Yang Zengxin, was suspicious about possible conspiracies among members of the Japanese mission, Russian consuls and the Cossacks. Yang reported to Beijing that Japanese officers had attempted to bring the Japanese army to Xinjiang on the pretext of a joint defence and to interfere in Ili by letting the Cossacks advance into Bolshevik’s Vernyi, which would pass through Xinjiang’s territory. In addition, a report from Kashgar hinted that the Japanese army supported the anti-Soviet guerrilla Basmachis in the Fergana Valley. In early 1920, the Cossacks were defeated by the Red Army and fled to Xinjiang. Nagamine witnessed the disarmament of Commander Annenkov, with whom the Japanese in Urumchi seemed to have maintained a relationship even after Nagamine’s departure from Ili.</p><p>The Japanese mission also attempted to promote economic interests in Xinjiang. According to Etherton, the British consul-general in Kashgar, Japanese products flowed into Xinjiang in 1919, and Japan was considered a possible rival of Britain over the Xinjiang market. The Japanese mission tried to open a consulate in Xinjiang. In Urumchi, the Japanese entered into talks with ‘Russian’ merchants—who were in fact Muslim Turks—where they discussed Japanese naturalisation and Japanese protection. However, the talks failed. Despite his suspicion, Yang also relied on the Japanese for economic development. He consulted Major Narita in Urumchi about a large loan to construct a light railway and drill for oil. However, this offer was cancelled by order of Beijing. The Japanese General Staffs and Ministry of Foreign Affairs coldly refused Narita’s proposal.</p><p>Moreover, the Japanese mission engaged in propaganda towards Muslim Turks for some obscure agenda related to Pan-Asianism, Pan-Islamism and Pan-Turkism. According to Etherton, the Japanese avoided any direct support or propaganda towards the Turks. Later, Nagamine stirred up accusations that Britain would occupy southern Xinjiang. He also had a relationship with Tatar Pan-Turkist, an ex-officer of the military organisation ‘Harbi Shura’. Kaneko and Otaki, stationed in Urumchi, frequently visited Ottoman activist Ahmet Kemal İlkul in jail, who had been sent to Xinjiang from Constantinople in 1914 and engaged in educational and Pan-Turkic activities. Thus, it was rather natural for the Japanese to pay attention to İlkul.</p><p>Although not successful or long-lasting, the activities of the Japanese military mission to Xinjiang illustrate Japan’s interests in post-1917 Central Asia. Military intelligence about the Cossacks was their main object, but at the same time, they developed economic and propaganda interests that targeted Central Asian Turks, including Tatars. Certainly, such activities raised concerns with Yang and Etherton. In short, the Japanese mission to Xinjiang was one of the examples in which Japan tried to carve out a role in the Great Game of the early 20^th century.</p>