Synopsis for "The Yamazaki Endowment"
Several nuclear physicists arrive at a South Seas island at the behest of Dr. Yamazaki. Leaving their families aboard a ship anchored in the harbor, Yamazaki shows her guests her facilities, including a nuclear reactor. She shows them her crowning achievement, a giant monster which she releases into the sea. The beast destroys the anchored ship. Dr. Yamazaki has the outraged scientists removed by her guards.
The monster heads away from her island. In Australia, Godzilla stands on Manly Beach, apparently sleeping while the Australian army and G-Force observe him. While watching Godzilla, reports come in that something big is headed toward them. Dr. Yamazaki's monster attacks Godzilla and the monsters' battle takes them inland, into Sydney. Godzilla finally kills the other monster and heads back to sea. Back on Lord Howe Island, Dr. Yamazaki plans her next creation.
"If rough water and the threat of shark attack aren't enough to keep Australian bathers out of the water, how about a 300-foot-tall, fire-breathing lizard? Godzilla has taken to sunning himself on one of Australia's most popular beaches, giving the army and G-Force cause for concern. But it's all just a prelude to a battle royal when the mad Dr. Yamazaki's giant crustacean monster sets its sights on the city of Sydney and Godzilla! Get ready for "Thunder Downunder"!"