Chiaki J. Konaka (小中 千昭, Konaka Chiaki; born April 4, 1961) is a Japanese screenwriter and novelist. He was the head writer of anime series such as Serial Experiments Lain (1998), The Big O (1999–2003), Digimon Tamers (2001–02), Hellsing (2001–02), and Texhnolyze (2003), as well as the television drama Ultraman Tiga (1996–97). (Via Wikipedia)