Mamoru Oshii is a Japanese filmmaker, television director and writer. Famous for his philosophy-oriented storytelling, Oshii has directed a number of acclaimed anime films, including Urusei Yatsura 2: Beautiful Dreamer (1984), Angel's Egg (1985), Patlabor 2: The Movie (1993), and Ghost in the Shell (1995). He also holds the distinction of having created the first ever OVA, Dallos (1983). As a writer, Oshii has worked as a screenwriter, and occasionally as a manga writer and novelist. His most notable works as a writer include the manga Kerberos Panzer Cop (1988–2000) and its feature film adaptation Jin-Roh: The Wolf Brigade (1999).

Angel's Egg is a Japanese art film original video animation (OVA) written and directed by Mamoru Oshii. Released by Tokuma Shoten on 15 December 1985, the film was a collaboration between artist Yoshitaka Amano and Oshii. It features very little spoken dialogue and a story that is strongly allegorical which has led to many viewers confused by the film's supposed meaning.