In 1982, Japan initiated studies to build an indigenous substitute for the short-range surface-to-air FIM-92 Stinger missile in service with the Japanese Army, although the project was halted until 1988 when Toshiba eventually took over the entire project. The project, called “Keiko” or “SAM-X” was completed in 1990, and production begun in 1991, entered service in 1994 under designation “Type-91 Kin SAM” and “SAM-2“. The missile has an infrared guide, being able to record and recognize its target after launch, thus ignoring countermeasures such as flares and chaffs. They also has an IFF system, external battery and a training kit. In 2007 appeared the “Type-91 Kai” variant, with infrared image seeker, possibility of night shot and a smokeless engine among other improvements. From 1993 there is a self propelled version using a 4×4 “Kokidosha” light vehicle and designated as “Type-93 SAM” that has replaced the Oerlikon GDF 35mm twin anti-aircraft guns in the JGSDF. The system consists in the assembly of eight ready to fire Type-91 missiles on a mobile turret together with the vision and guidance elements.
TYPE-91/93 missile gallery and more info