"Kaiju" characters can be considered giant science fiction and fantasy creatures, and can be depicted as antagonistic, protagonistic, or a neutral force of nature. Godzilla has taken on all three roles at various points in the "Godzilla" franchise. Other examples of "kaiju" include Rodan, Mothra, King Ghidorah, Anguirus, King Kong, Gamera, Daimajin, Maxipes Fik, , Guilala, Clover, Nemesis and Yonggary. Some Mecha characters, such as Mechagodzilla, M.O.G.U.E.R.A., Mechani-Kong, Trypticon, Deathsaurus, and Dragonzord may also count as "kaiju". The term "urutora-kaijū" ("ultra-kaiju") is longhand for "kaijū" in the "Ultra Series". "Daikaijū" () literally translates as "large "kaiju"" or "great "kaiju"" and refers to the larger monsters. The exact distinction is debated. This term is used for the most powerful "kaiju", the prefix "dai-" emphasizing great power or status. The first appearance of the term "daikaiju" is in the Japanese title of "Rodan", . Godzilla, Rodan and Mothra are the "san daikaijū", the three great "kaiju". An example of the term exists in a 1908 book. "Kaijin" () refers to humanoid "kaiju" found in "tokusatsu" media, and is literally translated as "monster man" or "mystery man". The villains of the week from the "Kamen Rider Series" are examples of "kaijin". In some instances, they have the ability to grow to kaiju-size, most notably in "Super Sentai" and "Power Rangers". "Seijin" (), literally "star people", appears within Japanese words for extraterrestrial aliens, such as "Kaseijin" (), which means "Martian". Aliens can also be called "uchūjin" () which means "beings from space". But they only best well known in the Ultra Series. "Kaijū eiga" (, "kaiju movie") is a film featuring one or more "kaiju". Toho has produced a variety of "kaiju" films over the years (many of which feature Godzilla, Rodan and Mothra); but other Japanese studios contributed to the genre by producing films and shows of their own: Daiei Film (Kadokawa Pictures), Tsuburaya Productions, and Shochiku and Nikkatsu Studios.