During the Russo-Japanese War, he served as brigadier general of the first legion of the cavalry (the Japanese military) and fought against the Russian military as the member of the second string (the Japanese military) in Saka-kaisen (recounter), Kokkodai-Kaisen, and Hoten-Kaisen using his full knowledge in cavalry tactics.
日露戦争において騎兵第1旅団(日本軍)長として出征し、第2軍(日本軍)に属して、沙河会戦、黒溝台会戦、奉天会戦などで騎兵戦術を駆使してロシア軍と戦う。