Gammera The Invincible Reviews
Also known as the turtle who lived in Godzilla's shadow.
Unlike the first Godzilla movie, the first Gamera film throws in a kid protagonist, which would become a hallmark of the series. Here, it doesn't mesh very well, since the kid is an antisocial outsider with an obsession with turtles and the annoying ability to sneak into high-security areas and plead with authorities that Gamera is a friendly turtle while Gamera behaves otherwise as they speak.
As far as providing a "giant monster destroys prop buildings" sort of movie, it does a serviceable job. The American dub is awful, and later Gamera movies ramp up the craziness and amusement factor.