The 91st Division (第91師団, Dai-kyūjūichi Shidan) was an infantry division in the Imperial Japanese Army. Its call sign was the Future Division (先兵団, Saki Heidan). It was created on 12 April 1944 in Paramushiro. The nucleus for the formation was the 1st Kuril Islands Garrison Group. It was an oversized type C(hei) security division, with its constituent brigades consisting of six infantry battalions each from July 1944. The division had two artillery regiments, which was highly unusual.