Yamaya Tanin was a naval theorist and admiral in the Imperial Japanese Navy during the early twentieth century. He was a great-grandfather of Japanese Empress Masako through her mother's lineage.

Akitsushima (秋津洲) was a protected cruiser of the Imperial Japanese Navy (IJN), designed and built by the Yokosuka Naval Arsenal in Japan. The name Akitsushima comes from an archaic name for Japan, as used in the ancient chronicle Kojiki.