JENDL Fusion File 99 (JENDL/F-99) was released in 1999. The data includes the double-differential cross sections (DDXs) of secondary neutrons have been evaluated for 79 isotopes and 13 natural elements ranging from H to Bi to improve the accuracy of predictions for the neutronics calculations in the D-T thermonuclear fusion applications. In addition, the DDXs for emission of charged particles (p, d, t, He-3 and α-particle) were given for H-2, Be-9 and elements heavier or equal to F.