Blue Impulse (ブルーインパルス, Burū Inparusu) (currently 11 Squadron 4th Air Wing, previously 21 Squadron 4th Air Wing) is the aerobatic demonstration team of the Japan Air Self-Defense Force (JASDF). The team was founded in 1960 as a team of six F-86 Sabres. They changed mounts to the Mitsubishi T-2 in 1980 and then to the Kawasaki T-4 in 1995. They are based at Matsushima Air Base, which was heavily damaged by the 2011 Tōhoku earthquake and tsunami.