Ago Bay (英虞湾, Ago-wan) is a bay in the city of Shima, Mie Prefecture, Japan. It is part of the Ise-Shima region. The bay is known for its beauty and sees many tourists each year, in particular due to a train network owned by Kintetsu which runs trains from both Osaka and Nagoya to Kashiko-jima, an island in the bay. Pearl cultivation was first invented in this bay by Kōkichi Mikimoto in 1893.