Okinoshima (沖島) was a large minelayer of the Imperial Japanese Navy (IJN), which was in service during the early stages of World War II. She was named after the Okinoshima Island in the Sea of Japan. She was the largest purpose-built minelayer in the IJN and the first Japanese minelayer to be equipped with a reconnaissance seaplane.

Tokiwa (常盤) was the second and last Asama-class armored cruiser built for the Imperial Japanese Navy (IJN) in the late 1890s. As Japan lacked the industrial capacity to build such warships herself, the ship was built in Britain. She played minor roles in the Boxer Rebellion of 1900 and World War I, but was very active during the Russo-Japanese War of 1904–05 where she participated in the Battle of Port Arthur, the Battle off Ulsan, and the Battle of Tsushima. After the war she was sometimes used as a training ship for naval cadets.