Here’s an interview with Satoshi Kon. There’s nothing particularly startling or revelatory there, but one of my favorite writers does get a mention:
As far as Phillip K. Dick is concerned, I haven’t read all of his works but I have read several. He is one of the authors that I prefer to read and it is also similar to the Kurt Vonnegut situation in that before I read the novel I saw the movie Blade Runner. I am very interested in the nightmare image. That is the influence I have from him which I have been saying that quite a bit in my interviews. Last year at the Hawaii Film Festival that was held, and the small synopsis they had in the program with Paprika said is was like a collision of Hello Kitty and Phillip K. Dick. I felt that was correct.
PKD could be quite brilliant times, but he could also be very hit-or-miss. Sometimes the very concepts that made you want to read the work were tossed aside in favor of trivia.