Paul Schrader
His experiences with the Yakuza in Japan led to a collaboration on a story with his brother, Paul Schrader. This resulted in the film "The Yakuza" (1974), starring Robert Mitchum and directed by Sydney Pollack. Leonard and Paul also co-wrote "Blue Collar" (1978), a story of defiant auto-workers in Detroit, directed by Paul Schrader starring Richard Pryor and Harvey Keitel, and "Old Boyfriends" (1979), about a woman's cross-country trek to visit old flames, directed by Joan Tewkesbury and starring John Belushi, Talia Shire, Keith Carradine, John Houseman.