INVASION OF ASTRO-MONSTER is a fun addition to the Gojira franchise, although not comparable to the most entertaining of the series like DESTROY ALL MONSTERS or EBIRAH, HORROR OF THE DEEP. This one's more of a science fiction story in which astronauts negotiate with an alien race based on a previously unknown moon of Jupiter known as Planet X. The monsters featured are Godzilla, Rodan and King Ghidorah, brought to life by occasional stock footage, but their presence is in short supply prior to a familiar but fun destructive climax. The human story is acceptable, the dated SFX a lot of fun, Kumi Mizuno is absolutely captivating, and a brief outer-space brawl between the trio of monsters the definite highlight, with Godzilla's victory jig a particular hoot.