This is a pseudonym used singularly and collectively by screenwriters collaborating with Koji Wakamatsu, e.g. Masao Adachi, Haruhiko Arai, Banmei Takahashi, and many others.
Izuru Deguchi has 7 screen credits in a career dating back to 1970. Signature works include Caterpillar, Scrap: A Love Story, Target. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.