What is katsuya onizuka?

As an AI language model, I do not have access to the personal information about individuals, unless it is publicly available information. However, I do have some information about a person named Katsuya Onizuka, who is a Japanese artist and animator. He is known for his work on several popular anime series, including "Gundam" and "The Big O." Onizuka has also worked on a number of video games, such as "Zone of the Enders" and "Metal Gear Solid 4: Guns of the Patriots."