Gamera vs. Guiron

Two boys, Akio and Tom, spot a spacecraft landing near their home and go to investigate. They climb aboard, the hatch closes, and the ship lifts off on its own, carrying them through space to Terra, a planet hidden on the far side of the Sun from Earth. There they are caught between two feuding monsters and meet the planet's only inhabitants, two women with plans for the children, while Gamera sets out to bring them home.

The film is the fourth entry in Daiei Film's series about the giant turtle, following Gamera vs. Gyaos and preceding Gamera vs. Jiger. Noriaki Yuasa, who had directed the series from its first installment, returned behind the camera, working from a screenplay by Nisan Takahashi, the series' regular writer, with Hidemasa Nagata producing. Nobuhiro Kajima and Christopher Murphy play Akio and Tom, with Miyuki Akiyama as Akio's sister Tomoko. Eiji Funakoshi, Kon Omura and Yūko Hamada appear in supporting roles.

Made for a family audience and running a little over eighty minutes, the film drew modest numbers of viewers on both major databases: on IMDb it holds 4.3 out of 10 from roughly 3,300 votes, and on TMDB 5.3 out of 10 from about a hundred ratings. Both figures indicate a limited and largely nostalgic audience rather than a broad one, in keeping with the series' reputation as matinee entertainment.