Harushio-class submarine

The "Harushio" class is a diesel-electric submarine class operated by the Japanese Maritime Self-Defense Force (JMSDF). The design is an evolution from the being slightly larger and with better noise reduction. "Asashio", has been modified to test air-independent propulsion (AIP), and the remaining vessels were decommissioned and replaced by the "Oyashio"-class.
"Natsushio", "Hayashio", "Arashio" and "Asashio" are all named after World War II destroyers.