On his storytelling process, Urasawa states, "When I start a new project, I start with the larger arc of the story. I visualize a movie trailer for that story, and after I compose this movie trailer in my mind, there comes a point where I'm so excited about it that I have to write the story. And then I imagine, 'Where do I start to begin to tell this narrative?' and that's usually the first chapter." He does not plan the story out in advance, claiming that it tells him where it wants to go, and that if the story does not keep surprising even him, then he can not continue making it.