Adagege, alternatively spelled Ada Gege or Ada-gege, is an artificial island built on the reef in the Lau Lagoon on Malaita in the Solomon Islands; it is located in Malaita Province. The road from Auki ends at Fouia wharf opposite the islands of Sulufou and Adaege in the Lau Lagoon. Adagege was the power base of Kwaisulia, a prominent strongman in the area who held influence from the early 1880s to his death in 1909, during which time the island was fortified with barbed wire.