Japanese invasion of Sakhalin
Ships from the 4th Fleet

The Imperial Japanese Army invasion force consisted of 14,000 men of the newly formed IJA 13th Division under General Haraguchi Kensai, supported by a naval force led by Admiral Kataoka Shichirō, consisting of four armored cruisers (under Vice Admiral Dewa Shigetō), four protected cruisers (under Rear Admiral Tōgō Masamichi), four coastal defense ships, nine destroyers and twelve torpedo boats.