Shinnkai 6500
NameShinkai 6500
In service1989
General characteristics
TypeDeep-submergence vehicle
Length9.5 m (31 ft)
Beam2.7 m (8.9 ft)
Draft3.2 m (10 ft)
Installed powerelectric motor
Speed2.5 knots (4.6 km/h; 2.9 mph)
Test depth6,500 m (21,300 ft)
Shinkai 6500 front view
Shinkai 6500 front view

The Shinkai 6500 (しんかい) is a crewed research submersible that can dive up to a depth of 6,500 metres (21,300 ft). It was completed in 1990. The Shinkai 6500 is owned and run by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) and it is launched from the support vessel Yokosuka.[1]

Two pilots and one researcher operate within a 73.5 mm-thick (2.89 in) titanium pressure hull with an internal diameter of 2.0 metres (6 ft 7 in).[2] Buoyancy is provided by syntactic foam.[3]

Three 14 cm (5.5 in) methacrylate resin view ports are arranged at the front and on each side of the vehicle.[3]

A Lego set based on the submersible was created through the Lego Cuusoo website.[4]


  1. ^ Ogura, S.; Kawama, I.; Sakurai, T.; Yoshiume, T.; lijima, K.; Imai, Y.; Ikuta, A.; Iwata, M. (2004). "Development of oil filled pressure compensated lithium-ion secondary battery for DSV Shinkai 6500". Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600). 3: 1720–1726. doi:10.1109/oceans.2004.1406384. Archived from the original on 11 March 2023. Retrieved 11 March 2023.
  2. ^ Komuku, Tetsuya; Matsumoto, Keita; Imai, Yoshiji; Sakurai, Toshiaki; Ito, Kazuhisa (April 2007). "1000 Dives by the Shinkai 6500 in 18 Years". 2007 Symposium on Underwater Technology and Workshop on Scientific Use of Submarine Cables and Related Technologies: 21–27. doi:10.1109/ut.2007.370833. Archived from the original on 11 March 2023. Retrieved 11 March 2023.
  3. ^ a b "SHINKAI 6500". Japan Agency for Marine-Earth Science and Technology. Archived from the original on 18 May 2019. Retrieved 11 March 2023.
  4. ^ Becraft, Andrew (12 March 2012). "DSV Beluga dives into the uncharted abyss". The Brothers Brick. Archived from the original on 29 January 2022. Retrieved 11 March 2023.