The Dhaiso, or Daiso, are an ethnic and linguistic group based at the foot of the Usambara Mountains in the Muheza District of Tanga Region in northeastern Tanzania. In 1999, the Dhaiso population was estimated to number 5,000, and the Dhaiso language is not being transmitted by adults to children. The Dhaiso are historically related to the Segeju, and are sometimes referred to as "Islamized Segeju". The Segeju are also found in the Kwale county of Kenya. Most of their tradition has been heavily influenced by their populous Digo neighbors. The Dhaiso and the Segeju are also historically linked to the Kamba.