蝦夷共和國
was a ship of the Tokugawa Navy, and following the collapse of the shogunate, was operated by Tokugawa loyalists under the Republic of Ezo during the Boshin War in Japan. An armed iron screw yacht, she had a length of 41.8 metres, a breadth of 5.45 metres, a draught of 3.23 metres, and weighed 370 tons. She was armed with four 12-pounder bronze cannons.