Bakufu kaigun (navy) was a navy with western-style armaments which was organized by Edo bakufu (Japanese feudal government headed by a shogun) to accomplish battles at sea as a mission.
幕府海軍（ばくふかいぐん）とは、江戸幕府が設置した、海上戦闘を任務とした西洋式軍備の海軍である。