Kaiju in the context of "Ultra Series"

Tokusatsu (特撮（とくさつ）; lit. 'special filming') is a Japanese term for live-action films or television programs that make heavy use of practical special effects. Credited to special effects director Eiji Tsuburaya, tokusatsu mainly refers to science fiction, superhero, fantasy, or horror media featuring such technology but is also occasionally dubbed a genre itself. Its contemporary use originated in the Japanese mass media around 1958 to explain special effects in an easy-to-understand manner and was popularized during the "first monster boom" (1966–1968). Prior to the monster boom, it was known in Japan as tokushu gijutsu (特殊技術; lit. 'special technology') or shortened tokugi (特技; lit. 'special technique').

Subgenres of tokusatsu include kaiju such as the Godzilla and Gamera series; superhero such as the Kamen Rider and Metal Hero series; Kyodai Hero like Ultraman and Denkou Choujin Gridman; and mecha like Giant Robo and Super Robot Red Baron. Some tokusatsu television programs combine several of these subgenres, for example, the Super Sentai series.

The Kamen Rider Series (Japanese: 仮面ライダーシリーズ, Hepburn: Kamen Raidā Shirīzu), also known as Masked Rider Series (until Decade and except Thailand), is a Japanese superhero media franchise consisting of tokusatsu television programs, films, manga, and anime, created by manga artist Shotaro Ishinomori. Kamen Rider media usually revolves around the titular defined group of motorcycle-riding superheroes with an insect motif who fights supervillains, often known as kaijin (怪人; lit. strange person).

The franchise began in 1971 with the Kamen Rider television series, which followed college student Takeshi Hongo and his quest to defeat the world-conquering Shocker organization. The original series spawned television and film sequels and launched the Second Kaiju Boom (also known as the Henshin Boom) on Japanese television during the early 1970s, impacting the superhero and action-adventure genres in Japan.

Godzilla (Japanese: ゴジラ, Hepburn: Gojira) is a Japanese giant monster, or kaiju, franchise centering on the titular character, a prehistoric reptilian monster awakened and powered by nuclear radiation. The films series are recognized by the Guinness World Records as the "longest continuously running film series", having been in ongoing production since 1954, with several hiatuses of varying lengths. There are 38 Godzilla films: 33 Japanese films produced and distributed by Toho Co., Ltd., and five American films; one by TriStar Pictures and four films (part of the Monsterverse franchise) by Legendary Pictures.

The original film, Godzilla, was directed by and co-written by Ishirō Honda and released by Toho in 1954. It became an influential classic of the genre. It featured political and social undertones relevant to Japan at the time. The 1954 film and its special effects director Eiji Tsuburaya are largely credited for establishing the template for tokusatsu, a technique of practical special effects filmmaking that would become essential in Japan's film industry since the release of Godzilla (1954). For its North American release, the film was localized in 1956 as Godzilla, King of the Monsters! and featured new footage with Raymond Burr edited together with the original Japanese footage.

Gamera (Japanese: ガメラ, Hepburn: Gamera) is a giant monster, or kaiju, that debuted in the 1965 film Gamera, the Giant Monster by Daiei Film. The character and the first film were intended to follow the success of Toho's Godzilla film series, while various staffs have participated in both and related franchises, and the two franchises have influenced each other. The Daiei franchise has become a Japanese icon in its own right and one of the many representatives of Japanese cinema, appearing in a total of 12 films produced by Daiei Film and later by Tokuma Shoten and Kadokawa Daiei Studio (Kadokawa Corporation) respectively, and various other media such as novels, anime, videos, manga and cartoons, magazines, video games, television programs, shows, other merchandises, and so on.

Gamera is depicted as a giant, flying, fire-breathing, prehistoric turtle. In the series' first film, Gamera is portrayed as an aggressive and destructive monster, though he also saved a child's life. As the films progressed, Gamera took on a more benevolent role, becoming a protector of humanity, especially children, nature, and the Earth from extraterrestrial races and other giant monsters.

Kyodai Hero (巨大ヒーロー, Kyodai Hīrō; lit. 'Giant Hero') is a television subgenre in tokusatsu that involves Japanese superheroes or robots either with the ability to grow to immense heights to fight giant monsters or who are originally giant as a part of their lives. The Kyodai Hero is the mainstream superhero genre that is widely popular in Japan. One of the earliest and most famous Kyodai heroes is Ultraman who made his debut in 1966. Since then, Ultraman has helped spawn the Kyodai Hero genre with countless shows, franchises and films such as Go! Godman and Iron King.

King Kong, also referred to simply as Kong, is a fictional giant monster, or kaiju, resembling a gorilla, who has appeared in various media since 1933. The character has become an international pop culture icon, appearing in several movies, comics, videogames and television series, as well as repeatedly crossing over with the Godzilla franchise. Kong has been dubbed the King of the Beasts.

His first appearance was in the novelization of the 1933 film King Kong from RKO Pictures, with the film premiering a little over two months later. A sequel quickly followed that same year with The Son of Kong, featuring Little Kong. The Japanese film company Toho later produced King Kong vs. Godzilla (1962), featuring a giant Kong battling Toho's Godzilla, and King Kong Escapes (1967), a film loosely based on Rankin/Bass' The King Kong Show (1966–1969). In 1976, Dino De Laurentiis produced a modern remake of the original film directed by John Guillermin. A sequel, King Kong Lives, followed a decade later featuring a Lady Kong. Another remake of the original, set in 1933, was released in 2005 by filmmaker Peter Jackson.