Deep (previously Deep2001) is a Japan-based mixed martial arts promoting and sanctioning organization. It is promoted by Shigeru Saeki who is also the former Public Relations Director of Pride Fighting Championships. Their inaugural event took place in 2001 and featured Paulo Filho and Royler Gracie. On May 17, 2008, Deep announced a partnership with ZST to share fighters, co-promote shows and eventually unify the promotions.