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Submarine 707 (サブマリン707, Sabumarin 707) is a Japanese manga series written and illustrated by Satoru Ozawa and serialized in Weekly Shōnen Sunday between 1963 and 1965. The manga series was adapted into two original video animations (OVA). The first OVA, titled Submarine 707: Deep Sea Fleet (深海の艦隊 サブマリン707, Shinkai no Kantai: Sabumarin 707), was produced by Knack Productions and released on 10 January 1997.