In 2011 the museum announced to cease the most parts of its operation for renovation, while keeping some functions active, including exhibit of Sōya, scientific research and educational programs.

[3] Until its closure, exhibits included Japanese boats, items related to the navy, shipping industry, fishing, sailing, maritime recreation, ship design and building, and the environment of the seas and oceans around Japan.

[4][5][6] The museum building itself is modelled after the British ocean liner Queen Elizabeth 2.

[1] Outside the museum building are a number of exhibits including a large screw propeller, Ayumi I-Go Ocean Floor House, Tankai Submarine and PC-18 submersible, a wooden fishing boat from Kujūkuri, Osesaki lighthouse and Anorisaki Lighthouse.

[7] Since May 1979 the icebreaker Sōya has been moored alongside the museum open to the public.