Ōtsu (disambiguation)

Ōtsu is the capital city of Shiga Prefecture, Japan

Ōtsu may also refer to:


 * Ōtsu Station, a railway station in Ōtsu, Shiga, Japan
 * Ōtsu District, Yamaguchi, a former district in Yamaguchi Prefecture, Japan
 * Ōtsu (surname), a Japanese surname
 * Ōtsu-juku, a station of the Nakasendō and the Tōkaidō
 * Otsu, a variant of the Type 89 I-Go medium tank