Otowa (音羽) was a protected cruiser of the Imperial Japanese Navy, designed and built by the Yokosuka Naval Arsenal in Japan. The name Otowa comes from a mountain in Kyoto, located behind Kiyomizu-dera. The waters from a waterfall at this temple were traditionally held to be a cure for all illnesses.

Admiral Arima Ryōkitsu was a career naval officer in the Imperial Japanese Navy during Meiji and Taishō periods.