Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship

Cho Kamen Rider Den-O & Decade NEO Generations The Movie: The Onigashima Battleship (劇場版 超・仮面ライダー電王＆ディケイド ＮＥＯ ジェネレーションズ 鬼ヶ島の戦艦 ,Gekijōban Chō-Kamen Raidā Den'ō ando Dikeido Neo Jenerēshonzu Onigashima no Senkan?, Super Masked Rider Den-O & Decade NEO Generations The Movie: The Onigashima Battleship) is the fourth film adaptation of the popular Kamen Rider Series Kamen Rider Den-O, following Kamen Rider Den-O: I'm Born!, Kamen Rider Den-O & Kiva: Climax Deka, and Saraba Kamen Rider Den-O: Final Countdown. The Onigashima Battleship is the first of the films to be part of the Cho Den-O Series, a new multimedia franchise featuring the characters of Den-O and many new characters. It opened in theaters on May 1, 2009.

Story
Taking place between the events of Kamen Rider Decade episodes 15 and 16, after saving Den-O's World, Tsukasa Kadoya and company begin their journey to Kabuto's World when they are halted by Sieg who presents them a manuscript that detailed the legendary Oni Conquest with Momotaros' image on it. As this occured, the Tarōs mysteriously vanish from the DenLiner as they are about to help Kotaro Nogami out with a new threat. Joining the Den-Liner gang on another adventure, Tsukasa goes back to the feudal era to save Momotaros and the others, facing the Oni Brothers Kuchihiko and Mimihiko of Onigashima who are after the legendary time-traveling battleship.

Pre-production and casting
Initially scheduled to be released in April 2009, Toei later announced that the film would be included in the new Cho Den-O Series. The first new cast member to be announced was gravure idol Akina Minami. The cast members of Den-O to return include the voice actors of the Tarōs, Sieg, and Deneb, as well as the actors portraying Naomi, Kohana, and Owner, among others (Toshihiko Seki, Kōji Yusa, Masaki Terasoma, Kenichi Suzumura, Shin-ichiro Miki, Hōchū Ōtsuka, Rina Akiyama, Tamaki Matsumoto, Yuichi Nakamura, and Kenjirō Ishimaru). Also to be featured in the film are several cast members of the current Kamen Rider Series Kamen Rider Decade and some of the cast members of Kamen Rider Kiva who are possessed by Tarōs.

Movie-exclusive Kamen Riders
The movie's antagonists are the two Oni Brothers of Onigashima, who both use the Gelnewt (ゲルニュート ,Gerunyūto?) Mirror Monsters as their foot soldiers.

Kamen Rider Goldra

The eldest of two Oni Brothers, Kuchihiko (クチヒコ ,Kuchihiko?) has the ability to become Kamen Rider Goldra (仮面ライダーゴルドラ ,Kamen Raidā Gorudora?) and is armed with a Khakkhara as his weapon.

Kamen Rider Silvra

The younger Oni Brother, Mimihiko (ミミヒコ ,Mimihiko?) has the ability to become Kamen Rider Silvra (仮面ライダーシルバラ ,Kamen Raidā Shirubara?) and is armed with a kanabō as his weapon.

Cast
* Kotaro Nogami (野上 幸太郎 ,Nogami Kōtarō?): Dori Sakurada (桜田 通 ,Sakurada Dōri?)

* Tsukasa Kadoya (門矢 士 ,Kadoya Tsukasa?): Masahiro Inoue (井上 正大 ,Inoue Masahiro?)

* Daiki Kaito (海東 大樹 ,Kaitō Daiki?): Kimito Totani (戸谷 公人 ,Totani Kimito?)

* Toki (トキ ?): Akina Minami (南 明奈 ,Minami Akina?)

* Yu (ユウ ,Yū?): Ruka Sawaki (沢木 ルカ ,Sawaki Ruka?)

* Naomi (ナオミ ,Naomi?): Rina Akiyama (秋山 莉奈 ,Akiyama Rina?)

* Natsumi Hikari (光 夏海 ,Hikari Natsumi?): Kanna Mori (森 カンナ ,Mori Kanna?)

* Ryotaro Nogami (野上 良太郎 ,Nogami Ryōtarō?): Takuya Mizoguchi (溝口 琢矢 ,Mizoguchi Takuya?)

* Kohana (コハナ ,Kohana?): Tamaki Matsumoto (松元 環季 ,Matsumoto Tamaki?)

* Jiro (次狼 ,Jirō?): Kenji Matsuda (松田 賢二 ,Matsuda Kenji?)

* Ramon (ラモン ,Ramon?): Yuuki Ogoe (小越 勇輝 ,Ogoe Yūki?)

* Riki (力 ,Riki?): Eiji Takigawa (滝川 英治 ,Takigawa Eiji?)

* Yuto Sakurai (桜井 侑斗 ,Sakurai Yūto?): Yuichi Nakamura (中村 優一 ,Nakamura Yūichi?)

* Kuchihiko (クチヒコ ,Kuchihiko?): Eisuke Sasai (篠井 英介 ,Sasai Eisuke?)

* Mimihiko (ミミヒコ ,Mimihiko?): Shingo Yanagisawa (柳沢 慎吾 ,Yanagisawa Shingo?)

* Owner (オーナー ,Ōnā?): Kenjirō Ishimaru (石丸 謙二郎 ,Ishimaru Kenjirō?)

* Eijiro Hikari (光 栄次郎 ,Hikari Eijirō?): Renji Ishibashi (石橋 蓮司 ,Ishibashi Renji?)

Voice actors
* Momotaros (モモタロス ,Momotarosu?): Toshihiko Seki (関 俊彦 ,Seki Toshihiko?)

* Urataros (ウラタロス ,Uratarosu?): Kōji Yusa (遊佐 浩二 ,Yusa Kōji?)

* Kintaros (キンタロス ,Kintarosu?): Masaki Terasoma (てらそま まさき ,Terasoma Masaki?)

* Ryutaros (リュウタロス ,Ryūtarosu?): Kenichi Suzumura (鈴村 健一 ,Suzumura Ken'ichi?)

* Deneb (デネブ ,Denebu?): Hōchū Ōtsuka (大塚 芳忠 ,Ōtsuka Hōchū?)

* Sieg (ジーク ,Jīku?): Shin-ichiro Miki (三木 眞一郎 ,Miki Shin'ichirō?)

* Teddy (テディ ,Tedi?): Daisuke Ono (小野 大輔 ,Ono Daisuke?)

Songs
Theme song

* "Cho Climax Jump" (超 Climax Jump ,Chō Kuraimakkusu Janpu?)

o Lyrics: Shoko Fujibayashi o Composition & Arrangement: Shuhei Naruse o Artist: Den-O All Stars (電王オールスターズ ,Den'ō Ōru Sutāzu?): Momotaros (Toshihiko Seki), Urataros (Kōji Yusa), Kintaros (Masaki Terasoma), Ryutaros (Kenichi Suzumura), Teddy (Daisuke Ono), the Owner (Kenjirō Ishimaru), Kotaro Nogami (Dori Sakurada), Naomi (Rina Akiyama), and Kohana (Tamaki Matsumoto)