A referendum was held in Okinawa Prefecture on 24 February 2019. The referendum asked whether voters approved or opposed the landfill work at Henoko Bay for the construction of a new United States Marine Corps base. This is the second prefecture-wide referendum in Okinawa, the first being the 1996 referendum on the reduction of US military presence. Governor Denny Tamaki announced the referendum in November 2018, fulfilling his manifesto promise from his successful campaign for governor.