Shinichi Sekizawa was a Japanese screenwriter noted for his immense contributions to several films by Ishirō Honda, including several classic Godzilla films. He also contributed material to the original Ultraman series and several Tōei Dōga films such as Gulliver's Travels Beyond the Moon and Jack and the Witch.

Ultraman is a Japanese tokusatsu science fiction television series created by Eiji Tsuburaya. Produced by Tsuburaya Productions, it is a follow-up to Ultra Q, though not technically a sequel or spin-off. Tsuburaya Productions produced 39 episodes that aired on Tokyo Broadcasting System (TBS) and its affiliate stations from July 17, 1966, to April 9, 1967. Its premiere topped the average rating set by Ultra Q and kept climbing each week, marking the show as a success. It was also the first Japanese television series to use a bidding system for commercial rights, allowing multiple third-party companies to sponsor the show. This was following TBS's merchandising troubles with its predecessor.