Yoshida was graduate of the 32nd class of the Imperial Japanese Naval Academy in 1904, ranking 12th out of 190 cadets. The  Russo-Japanese War had just started, and he served as a midshipman on the submarine tender , and participated in the Battle of Tsushima aboard the cruiser .
Yoshida was a member of the Imperial Japanese Naval Academy's 32nd class graduating in 1904, ranking 12th out of 190 cadets. With the Russo-Japanese War underway, he served as a midshipman on the submarine tender and participated in the Battle of Tsushima aboard the cruiser.