Gamera vs. Jiger (ガメラ対大魔獣ジャイガー, Gamera tai Daimajū Jaigā, lit. 'Gamera vs. Giant Devil Beast Jiger') is a 1970 Japanese kaiju film directed by Noriaki Yuasa, written by Niisan Takahashi, and produced by Daiei Film. It is the sixth entry in the Gamera film series, following Gamera vs. Guiron, which was released one year prior. Gamera vs. Jiger stars Tsutomu Takakuwa, Kelly Burris, Katherine Murphy, and Kon Ohmura, and features the fictional giant flying turtle monster Gamera. The film was released theatrically in Japan on 21 March 1970, and did not receive a theatrical release in the United States, instead being released directly to television by American International Television in 1970 under the title Gamera vs. Monster X. The film was followed by Gamera vs. Zigra the following year.