The contact was lost when the fighter carried out a training flight, the NHK broadcaster reported. The jet is assigned to the Tsuiki air field, located in the Fukuoka Prefecture.
There were reportedly two officers on board of the disappeared plane. According to Japanese Defence Minister Takeshi Iwaya, both officers are alive.
"Concerning the two crew members of the Japan Self-Defence Forces' F-2 fighter that disappeared from radars, it turned out that they are alive," the minister said addressing to the country's parliament.
However, Iwaya has not provided any other details of the incident.