on "The Greatest Robot on Earth" arc, which is his favorite. After re-reading it, he felt that some scenes were missing or different than he remembered, before realizing that he had created his own version of the story in his head. Initially, Urasawa had pitched the idea as if someone else would create it. After many people, including Nagasaki, told him he should be the one to do it, Urasawa said the idea that resulted from story discussions seemed "too good to let anybody else do." Urasawa, Nagasaki, and an editor from Shogakukan approached Tezuka Productions with the idea. Tezuka's son Macoto Tezka was informed of the idea in winter 2002. But with a new anime adaptation and other events already in the works, he did not want it to feel as if they were capitalizing on the special occasion. He felt there would be plenty of opportunity to have other artists do it at a later date and politely turned Urasawa down. However, Urasawa persisted and asked for a meeting where he would show rough sketches and explain what kind of story he wanted to create. Macoto met with Urasawa, Nagasaki and others on March 28, 2003. Macoto made Urasawa promise not to imitate his father but make the story in his own style, and even asked him to rethink the character designs. Fusanosuke Natsume pointed out that in Pluto Urasawa included references not only to other Astro Boy arcs, but to other works by Tezuka as well, such as the characters Tawashi and Nakamura; the police car designed to look like a dog; Uran's encounter with animals; and an obsolete robot maid. He suspects the last is a reference to the "Future" volume of Phoenix. Although people often call Pluto a dark take on a children's classic, Urasawa feels that the idea that Tezuka's work is lighthearted is a common misconception. He described "The Greatest Robot on Earth" arc as not being "about a righteous robot that took down bad robots, it was about the emptiness of war. When I read that when I was about 4, I felt like I had been told a very deep story, something meant for adults. I think everyone felt that way when they read it. It was never actually meant for kids." He additionally explained that through its anime and various adaptations it has been "reimagined as very wholesome and safe