Funryu (奮龍, Funryū) were a series of surface-to-air anti-aircraft missiles developed in Japan at the end of the Second World War. The missile's development in the late stages of the war was plagued by organisational problems and cancelled before becoming operational. In 1945, a few samples of SAM Funryu were created and tested, but due to the surrender of the Japanese Empire, had not been finalized. All the developments on the complex were destroyed after the end of hostilities.