Karafuto Prefecture
The Japanese occupied Sakhalin with minimal effort and low losses. The Russians lost 181 dead and had 3,270 taken prisoner. The reasons for the low Russian resistance lay in the low morale of the soldiers, who were mostly prisoners and deportees with little or no military training. Per the terms of the Treaty of Portsmouth ending the Russo-Japanese War, the southern half of Sakhalin was ceded to Japan, with the 50th parallel north as the boundary line, becoming Karafuto Prefecture.