Blue Impulse (ブルーインパルス, Burū Inparusu), or 11 Squadron, is the aerobatic demonstration team of the Japan Air Self-Defense Force. Originally founded in 1960 as a team of six F-86 Sabres, the team switched 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 a tsunami on March 11, 2011.