八甲田山
The Imperial Japanese Army's 8th Division's Fifth Infantry Regiment was stationed in the city of Aomori. The Imperial Japanese Army deemed it necessary to secure a route through the Hakkōda Mountains in the event that roads and railways were destroyed by shelling of the Aomori coastline by the Imperial Russian Navy during wintertime. Training in movement during winter conditions was also deemed necessary in light of a potential war with Russia, so a wintertime crossing of the Hakkōda Mountains was planned.