Shinkai 6500 (ãÂÂãÂÂãÂÂãÂÂ) is a crewed research submersible that can dive up to a depth of . 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.
Two pilots and one researcher operate within a titanium pressure hull with an internal diameter of . Buoyancy is provided by syntactic foam.
Three methacrylate resin view ports are arranged at the front and on each side of the vehicle.
A Lego set based on the submersible was created through the Lego Cuusoo website.