Sado Airport is a public aerodrome located 4km southwest of Ryōtsu in Sado, Niigata Prefecture, Japan.The airport opened in 1959 as a landing field to provide air service connecting Sado Island to Niigata Airport, and was expanded in 1971 to allow more extensive general aviation service. Service to and from Sado Airport has been indefinitely suspended since April 2014. New Japan Aviation provided scheduled service until the airport's closure, although other scheduled operators have served the airport in the past. Kyokushin Air operated the Sado-Niigata route until September 2008. In November 2015, Sado Airport announced to expend the runway to 2,000 meter from December 2015 to handle Jet service with additional destination to Tokyo-Haneda.