Four naval vessels of Japan have been named Asashio:

• Japanese destroyer Asashio (1902), a Shirakumo-class destroyer of the Imperial Japanese Navy during the Russo-Japanese War and World War I
• Japanese destroyer Asashio (1936), lead ship of the 1936 Asashio class
• JDS Asashio (SS-562), lead ship of the 1965 Asashio class
• JDS Asashio (SS-589), a Harushio-class submarine of the Japanese Maritime Self-Defense Force in 1995

• Asashio-class destroyer, a class of ten destroyers of the Imperial Japanese Navy during World War II
• Asashio-class submarine, a class of four submarines of the Japanese Maritime Self-Defense Force in 1965