JS Chōgei

Chōgei before being launched, 4 October 2024
History
Japan
NameChōgei
BuilderMitsubishi Heavy Industries Kobe Shipyard
Cost68.4 billion yen
Laid down19 April 2022
Launched4 October 2024
CommissionedMarch 2026
IdentificationPennant number: SS-517
StatusFitting out
General characteristics
Class & typeTaigei-class submarine
Displacement3,000 t (3,000 long tons) (standard)
Length84 m (275 ft 7 in)
Beam9.1 m (29 ft 10 in)
Depth10.4 m (34 ft 1 in)
Installed power6,000 PS (4,400 kW; 5,900 hp) (shaft output)
PropulsionDiesel-electric transmission, lithium-ion batteries
Crew70
Sensors &
processing systems
  • OYX-1 Information processing subsystem
  • ZQX-12
  • 1x ZPS-6H surface search radar
  • ZQQ-8 Integrated Sonar
Armament

Chōgei (ちょうげい) is a diesel-electric submarine of the Japan Maritime Self-Defense Force, and the fifth and final member of the Taigei class. Her name is written in kanji as "長鯨", literally meaning "giant whale", and this is the third use of the name, after the Meiji-era steamboat Chōgei Maru, and the Imperial Japanese Navy's Jingei-class submarine tender Chōgei.