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Under threat from an international terrorist organization, eleven nations form the Peace-Keeping Navy (PKN), only for the evil Admiral Red to crash his submarine into the PKN fleet and almost destroy it at the opening ceremony. Only commander Hayami of the Japanese sub 707R stands between him and victory, leading to a cat-and-mouse game on the high seas.
The submarine genre is understandably limited in its potential, leading elements of Submarine 707R to play like innumerable other underwater thrillers, most notably Silent Service and The Hunt for Red October (1990). Its clearest parallels, however, are with the criminal mastermind and plucky Japanese supersub of Blue Submarine No. Six, whose creator, Satoru Ozawa, also wrote the original 1963 manga of 707R. 707R really plays up its retro origins, often looking more like Astro Boy or Gigantor, both in its cartoonish design and the deliberate juxtaposition of it with more serious themes-it is worth remarking that where 707R has an Admiral Red, there is a Duke Red in Tezuka's Metropolis.
Ozawa's work has been cited by many animators of the modern generation as a prime influence on their obsession with technology and sci-fi. Notable among them is Evangelion-director Hideaki Anno, who is acknowledged here as the director of the opening credit sequence, leading some sources (and unscrupulous foreign distributors) to credit him with direction of the entire series.