Nippon Maru is a Japanese museum ship and former training vessel. She is permanently docked in Yokohama harbor, in Nippon Maru Memorial Park. She was built by Kawasaki Shipbuilding Corporation in Kobe, and was launched on 27 January 1930 alongside her sister ship Kaiwo Maru. She was operated by the Tokyo Institute for Maritime Training to train officers for Japan's merchant marine.