The government has decided to conduct a DNA test for the first time on what is believed to be the remains of a Japanese soldier who died in a battle with Soviet forces in 1945, government sources said Wednesday.

The man is thought to have died in a battle on Shumshu Island, now part of Russia's Kuril Islands, shortly after Japan's surrender in World War II on Aug. 15, 1945, according to the sources.

Shumshu Island, the second northernmost of what Japan called the Chishima Island group, was invaded by Soviet forces before dawn on Aug. 18, 1945, sparking a major battle through Aug. 23 that year, in which at least several hundred Japanese and Soviet troops died.