Benxihu Colliery accident in Manchukuo leaves 1,549 Chinese miners dead.

Benxihu (Honkeiko) Colliery was a coal mine in Benxi, Liaoning, China, first mined in 1905. Originally an iron and coal mining project under joint Japanese and Chinese control, the mine came under predominantly Japanese control. In the early 1930s, Japan invaded the northeast of China, and Liaoning province became part of the Japanese-controlled puppet state of Manchukuo. During the Second Sino-Japanese War, the Japanese forced Chinese labourers—some of whom had been captured from local military organizations—to work the colliery under very poor conditions. Food was scarce and workers did not have sufficient clothing. Working conditions were harsh, and diseases such as typhoid and cholera flourished due to poor sanitation and water supplies. Typically, miners worked 12-hour shifts or longer. The Japanese controllers were known to beat workers with pick handles, and the perimeter of the mine was fenced and guarded. Many describe the conditions as slave labour.