Mothra and her fairies return to Japan to warn mankind that they must return Kiryu to the sea, for the dead must not be disturbed. However Godzilla has survived to menace Japan leaving Kiryu as the nation's only defense.

摩托车赛车手山城拓也从蜘蛛星的最后一位幸存者那里获得了惊人的能力，并以此能力与巨型机器人豹金刚一起，以蜘蛛侠的身份对抗怪物教授和他的邪恶铁十字军团！本剧源自东映公司与漫威漫画的合作协议，在赞助商万代要求加入巨型机器人之后，蜘蛛侠的起源发生了根本性的改变。该剧大受欢迎，共播出 41 集，甚至还衍生出了一部电影

Ford Brody, a Navy bomb expert, has just reunited with his family in San Francisco when he is forced to go to Japan to help his estranged father, Joe. Soon, both men are swept up in an escalating crisis when an ancient alpha predator arises from the sea to combat malevolent adversaries that threaten the survival of humanity. The creatures leave colossal destruction in their wake, as they make their way toward their final battleground: San Francisco.

Journalists Ichiro Sakai and Junko cover the wreckage of a typhoon when an enormous egg is found and claimed by greedy entrepreneurs. Mothra's fairies arrive and are aided by the journalists in a plea for its return. As their requests are denied, Godzilla arises near Nagoya and the people of Infant Island must decide if they are willing to answer Japan's own pleas for help.

After a meteorite unleashes a three-headed beast upon Tokyo, Mothra tries to unite with Godzilla and Rodan to battle the extraterrestrial threat.