Kaifu (海部郡 Kaifu-gun?) is a district located in Tokushima Prefecture, Japan.
As of 2003, the district has an estimated population of 26,399 and a density of 50.28 persons per km². The total area is 525.00 km².
Coordinates: 33°41′28″N 134°22′30″E / 33.691°N 134.375°E