Japanese merchant ship Yobu served as auxiliary vessel in the Russo-Japanese war between 1904-1905

War between the Russian and Japanese empires 8 February 1904-5 September 1905. Former Korean gunboat.

Source

Official history (Naval and Military) of the Russo-Japanese War. Vol. II. Liao Yang, the Sha Ho, Port Arthur. Prepared by the Historical Section of the Committee of Imperial Defence. London, 1912.