is a Japanese animation studio founded on September 1, 1975 by Hiroshi Wakao. They are best known for their unique use of gags, references, avant garde cinematography notably in Pani Poni Dash!, Maria Holic, Sayonara Zetsubo Sensei, Hidamari Sketch, Puella Magi Madoka Magica, Nisekoi, and Bakemonogatari.