is a Japanese pro-wrestling-themed tokusatsu/anime superhero television series produced by Tsuburaya Productions, and created by Go Nagai and Ken Ishikawa. Nagai and Ishikawa created three manga series, simply named , published in different magazines by Shogakukan. None of them are related between them or the TV show. They were compiled in a single tankōbon in 1978 (Futabasha), 1986 (Asahi Sonorama) and 2001 (Futabasha).