| Submarine 707 | |
| Ja Kanji: | サブマリン707 |
| Ja Romaji: | Sabumarin 707 |
| Type: | manga |
| Author: | Satoru Ozawa |
| Publisher: | Shogakukan |
| Demographic: | Shōnen |
| Magazine: | Weekly Shōnen Sunday |
| First: | 1963 |
| Last: | 1965 |
| Volumes: | 6 |
| Type: | ova |
| Submarine 707: Deep Sea Fleet | |
| Director: | Teruo Kogure |
| Producer: | Noriko Nishino |
| Music: | Masakuni Kikuchi |
| Studio: | Knack Productions |
| Released: | 10 January 1997 |
| Runtime: | 45 minutes |
| Type: | ova |
| Submarine 707R | |
| Director: | Shōichi Masuo |
| Music: | Yutaka Minobe Hideaki Kobayashi |
| Studio: | Group TAC |
| Released: | 26 September 2003 |
| Runtime: | 45 minutes (each) |
| Episodes: | 2 |
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, was produced by Knack Productions and released on 10 January 1997. The second OVA, titled, consisted of two episodes produced by Group TAC and was released between 26 September 2003 and 28 April 2004.
In the near future, the world is at war: the USR (the Undersea Silence Revolution or theUnderwater Silence Revolution) a mysterious organization led by Admiral Red and his powerful submarine UX, wants to stop human exploitation of the seas, having torpedoed many ships and ports. The world's navies unite and form the Peace Keeping Navy, or PKN, to fight the "terrorists". Every major UN member contributed a submarine, though the Japanese entry is an old clunker, the 707, and it is running late to the inaugural meeting. When the meeting finally begins, Admiral Red and the UX come to spoil the show with a spread of torpedoes. Arriving late in the battle, Captain Youhei Hayami steers the 707 into the way of a torpedo launched at the supercarrier that serves as the PKN's flagship. His ship is destroyed, but the flagship survives.
Six months later, Captain Hayami is given command of the salvaged and rebuilt 707, and takes a crew of old comrades and brand new cadets to sea to fight Admiral Red once more.
The first original attempt for an anime series based on the manga was planned back in 1964 but around the same time released as an audio drama on .
In 1997, an OVA was released that titled byToei Doga. The "Submarine 707R" OVAs were released by Aniplex back in Sept. 26, 2003 (mission 01) and April 24, 2004 (mission 02).