Search found 1 match: Lawrence Kasdan

Well, alright. Update, again with a 4-film minimum, and again strictly counting only screenwriters (not novelists, etc):

1. Kôgo Noda 9.33 / 9 films (all for Ozu)
2. Zenzô Matsuyama 9.00 / 4 films* (Human Condition Trilogy + 1 Naruse)
3. Yoshikata Yoda 8.00 / 8 films (all Mizoguchi)
4/5/6. Lawrence Kasdan 8.00 / 4 films (Star Wars 5/6/7 + Raiders of the Lost Ark)
Ennio Flaiano, Tullio Pinelli 8 / 4 films (same 4 films, all Fellini)
7. Shinobu Hashimoto 7.86 / 7 films (mostly Kurosawa)
8. Ryuzo Kikushima 7.80 / 5 films (top film is by Naruse; other 4 all Kurosawa. Somehow he lost a credit sometime since 2013)
9. Matsutarô Kawaguchi 7.75 / 4 films (all Mizoguchi)
10. Hideo Oguni 7.71 / 7 films (all Kurosawa)