Shimofusa Air Base (下総航空基地, Shimohusa Kōkū Kichi) (ICAO: RJTL), officially Shimohusa Air Base, is a military aerodrome of the Japan Maritime Self-Defense Force. It is located 5.4 NM (10.0 km; 6.2 mi) east of Matsudo in Chiba Prefecture, Japan. The base straddles the border between Kashiwa and Kamagaya cities.