The Gotengo (轟天号 Gōten-gō , "Roaring Heaven", the suffix, "号" (gō), simply denotes the object as a ship), also known in the West as Atragon, is a submarine battleship that has appeared in several tokusatsu films of Toho Company, Ltd., beginning with Atragon in 1963. It was first conceived by author Shunrō Oshikawa in his 1899 novel Kaitei Gunkan ("Undersea Battleship"), of which Atragon was an adaptation produced by Toho Studios. The submarine is heavily armed and armored, but its trademark tactic is to ram and sink enemy ships. In cinema, the submarine is easily identifiable by the enormous drill on its bow; it is also notable for being able to burrow underground and fly. The Gotengo also makes an appearance in the film for Toho's The War in Space and Chousei Kantai Sazer-X, Chousei Kantai Sazer-X: Fight! Warriors of the Stars.
The Gotengo is used mostly for battling monsters in the 2004 Millennium Godzilla film Godzilla: Final Wars. For instance, in the first sequence it is battling the mutant dinosaur Godzilla in the 1960s, resulting in Godzilla's burial under hundreds of feet of ice. Immediately after the opening credits, the Gotengo is locked in battle against the sea dragon Manda, which the ship defeats with an emergency maneuver through an underwater volcano and a combination of the Absolute Zero Cannon and drill. Later on, during the Xilien-induced monster attacks on major cities, the Gotengo is dispatched to destroy them. However, the only weapon that truly works to destroy the alien threat is Godzilla himself.
The Gotengo appeared as a playable character in the Super Nintendo game Godzilla: War of the Monsters.
The Gotengo also appeared in the video game Godzilla: Unleashed as an unplayable boss-style character.