English: A correspondent for Asahi Newspaper reported that on December 13 and 14, 1937, the Morozumi Unit (the 65th Infantry Regiment of the Yamada Detachment in the 13th Division of the Imperial Japanese Army) took prisoners of 14,777 Chinese soldiers in the vicinity of the artillery fort of Wulong Mountain and Mufu Mountain that lay between the northern border of Nanjing city wall and the south bank of the Yangtze River. This photo shows part of the captives accommodated by Japanese troops near Mufu Mountain.
However, there had been no further follow-up report since then and for decades. In the late 1980s, Ono Kenji investigated the incident by interviewing 200 or so war veterans and gathering 24 wartime diaries and other historical materials. Ono's research made it clear that the 15,000 captives and additional 2,000 to 3,000 prisoners taken after the 14th were all massacred by military order. [1]