godzilla vs gigan (1972)

aka War of the Monsters. Chikyû kogeki meirei: Gojira tai Gaigan. Earth Assault Order: Godzilla vs. Gigan. Godzilla on Monster Island.
"Something funny going on, you better check!"
Aliens arrive with a plan to conquer earth using Gigan and King Ghidrah, but thankfully Godzilla and Anguirus stand in their way.
Godzilla gets to chat with his mate Anguirus before pounding a couple of alien monsters. All in a days work for our friendly giant reptile.

godzilla vs megalon (1973)

aka Gojira tai Megaro.
"Jet Jaguar, lets go now."
Megalon and Gigan are sent by the undersea nation of Seatopia to attack the surface peoples of the earth. Meanwhile some scientists have developed Jet Jaguar, a robot, to help. But then the Seatopians steal the robot and use it to control their monsters, crafty devils that they are. Can the scientists regain control of Jet Jaguar, and where the hell is Godzilla whilst Tokyo is being trashed yet again?
This the thirteenth Godzilla is the only one to feature Jet Jaguar and Megalon. Contains the usual fun, fighting and plenty of city trashing.

son of godzilla (1967)

AKA Monster Island's Decisive Battle: Godzilla's Son. Kaijûtô no kessen: Gojira no musuko.
"...it appears to be teaching its son. "
A team of weather changing scientists are conducting a number of tests on an island when one goes wrong, creating a radioactive storm. This causes some animals, to mutate and grow. The scientists try and study these creatures when they uncover a giant egg. The egg is cracked open and produces a baby Godzilla. When some mutant preying mantises attack it the youngesters distressed cries bring Godzilla to the island. Cue Godzilla teaching the youngster how to stomp monsters and blow smoke rings.
Not one of the better Godzilla films, mainly due to a lack of stomping city action.

godzilla vs mechagodzilla (1974)

AKA Godzilla vs. Bionic Monster. Godzilla vs. Cosmic Monster. Gojira tai Mekagojira.
"Look at that!"
Aliens have built a mechanical version of Godzilla, in order to be able to take over the world, but they don't count on Godzilla getting a second wind and the help of some humans.
The first appearance of Mechagodzilla on film and he wastes no time in whipping Godzilla to within an inch of his life. The fights and general pacing of the film leave you breathless, as they trash the Japanese countryside. Not one with a major plot, but that's not why you watch Godzilla for after all!
Japanese, Monster, Horror, Jun Fukuda,

ebirah, horror of the deep (1966)

AKA Godzilla vs The Sea Monster. Godzilla, Ebirah, Mothra: Big Duel in the South Seas. Gojira, Ebirâ, Mosura: Nankai no daiketto. Big Duel in the North. Big Duel in the North Sea. Ebirah, Terror of the Deep. The Great South Seas Duel.
"It could be Mothra's asleep at present. Our prayers will reach its source and it will arrive. Yes, I'm sure Mothra is soon going to hear us!"
A man is lost at sea and his brother with some friends tries to find him, but their lucks not in as they encounter Ebirah, a giant lobster, who smashes their yacht. They wash up on an island, where some terrorists are making heavy water, and have enslaved the local islanders to do this. To avoid capture the friends team up with an escaped native girl and hide in some caves. There they stumble on a sleeping Godzilla and they devise a plan to awaken in the hope that the monster will help them defeat the gang and free the slaves. Que monster fight number one, before Godzilla then takes on Mothra in the second bout of the evening.
One of the lesser Godzilla adventures, mainly because it takes some time to get to him, but once he arrives the film livens up considerably, with some great fight sequences.