Isomura is a huge fan of Darth Vader from the Star Wars franchise, and has stated his portrayal of Alain was slightly inspired by him.
He is allergic to both dogs and cats.
He likes zombie films, especially ones directed by George A. Romero.
He is a very good cook, having been trained by a professional chef during his part-time job. When he was a guest at the variety game show Pyramid Derby, he won most of the cooking challenges.