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The series is divided into two story arcs:[1]
- Episodes 1-19 - The Start of the Journey ~The 9 Rider Worlds~ Arc (「旅の始まり ~9つのライダー世界~」編, "Tabi no Hajimari ~Kokonotsu no Raidā Sekai~"-Hen), this arc introduces most of the main characters and the plot, and focuses on tributing alternative versions of the previous 9 Heisei Riders' Series, while Tsukasa Kadoya as Kamen Rider Decade, along with Natsumi and Eijiro Hikari, travel through them in order to save them.
- Episodes 20-31 - The Neverending Journey ~Dai-Shocker's Debut~ Arc (「終わらない旅 ~大ショッカー出現~」編, "Owaranai Tabi ~Dai-Shokkā Shutsugen~"-Hen), this arc deals with Tsukasa having to endlessly travel through even more worlds, while discovering his true nature as the Great Leader of Dai-Shocker (the movie All Riders vs. Dai-Shocker is in fact a fundamental part of the arc, and a cliffhanger at the end of the TV series even sets a Conclusion Arc within Movie War 2010).
Generally, episodes of Decade are titled similarly to the episodes of the series that they reference, if it actually tributes a past series (this was later inspiring Kaizoku Sentai Gokaiger).
- Rider War (ライダー大戦, Raidā Taisen)
- The World of Kuuga (クウガの世界, Kūga no Sekai)
- Start of events leading to Kamen Rider Kuuga tribute.
- Transcendence (超絶, Chōzetsu)
- Tribute to Kamen Rider Kuuga.
- Second Movement ♬ Prince Kiva (第二楽章♬キバの王子, Dai Ni Gakushō ♬ Kiba no Ōji)
- Tribute to Kamen Rider Kiva.
- The Biting King's Qualifications (かみつき王の資格, Kamitsuki Ō no Shikaku)
- Tribute to Kamen Rider Kiva.
- Battle Trial: Ryuki World (バトル裁判・龍騎ワールド, Batoru Saiban: Ryūki Wārudo)
- Tribute to Kamen Rider Ryuki.
- Super Trick of the Real Criminal (超トリックの真犯人, Chō Torikku no Shinhannin)
- Tribute to Kamen Rider Ryuki.
- Welcome to the Blade Restaurant (ブレイド食堂いらっしゃいませ, Bureido Shokudō Irasshaimase)
- Tribute to Kamen Rider Blade.
- Blade Blade (ブレイドブレード, Bureido Burēdo)
- Tribute to Kamen Rider Blade.
- Faiz High School's Phantom Thief (ファイズ学園の怪盗, Faizu Gakuen no Kaitō)
- Tribute to Kamen Rider 555.
- 555 Faces, 1 Treasure (555つの顔、1つの宝, Faizutsu no Kao, Hitotsu no Takara)
- Tribute to Kamen Rider 555.
- Reunion: Project Agito (再会 プロジェクト・アギト, Saikai: Purojekuto Agito)
- Tribute to Kamen Rider Agito.
- Awakening: Tornado of Souls (覚醒 魂のトルネード, Kakusei: Tamashii no Torunēdo)
- Tribute to Kamen Rider Agito.
- Super Den-O Beginning (超・電王ビギニング, Chō Den'ō Biginingu)
- Tribute to Kamen Rider Den-O.
- Here Comes Super Momotaros! (超モモタロス、参上!, Chō Momotarosu, Sanjō!)
- Tribute to Kamen Rider Den-O.
- Warning: Kabuto Running Amok (警告:カブト暴走中, Keikoku: Kabuto Bōsōchū)
- Tribute to Kamen Rider Kabuto.
- The Grandma Way of Taste (おばあちゃん味の道, Obaachan Aji no Michi)
- Tribute to Kamen Rider Kabuto.
- Idle Hibiki (サボる響鬼, Saboru Hibiki)
- Tribute to Kamen Rider Hibiki.
- Ending Journey (終わる旅, Owaru Tabi)
- Tribute to Kamen Rider Hibiki.
- The Nega-World's Dark Riders (ネガ世界の闇ライダー, Nega Sekai no Yami Raidā)
- Tribute to Dark Riders.
- The Walking All-Rider Album (歩く完全ライダー図鑑, Aruku Kanzen Raidā Zukan)
- Tribute to Dark Riders.
- Wanted: Diend (ディエンド指名手配, Diendo Shimeitehai)
- Tribute to Kamen Rider Blade: Missing Ace.
- End of Diend (エンド・オブ・ディエンド, Endo Obu Diendo)
- Tribute to Kamen Rider Blade: Missing Ace.
- The Arrival of the Samurai Sentai (見参侍戦隊, Kenzan Samurai Sentai)
- Crossover with Samurai Sentai Shinkenger
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- Crossover with Samurai Sentai Shinkenger
- Heretic Rider, Go Forth! (外道ライダー、参る!, Gedō Raidā, Mairu!)
- Crossover with Samurai Sentai Shinkenger.
- RX! Dai-Shocker Attack (RX!大ショッカー来襲, Āru Ekkusu! Daishokkā Raishū)
- Tribute to Kamen Rider Black RX.
- Black × Black RX (BLACK×BLACK RX )
- Tribute to Kamen Rider Black and Kamen Rider Black RX.
- Amazon, Friend (アマゾン、トモダチ, Amazon, Tomodachi)
- Tribute to Kamen Rider Amazon.
- The Strong, Naked, Strong Guy (強くてハダカで強い奴, Tsuyokute Hadaka de Tsuyoi Yatsu)
- Tribute to Kamen Rider Amazon.
- Rider War: Prologue (ライダー大戦・序章, Raidā Taisen: Joshō)
- Tribute to Heisei Riders.
- The Destroyer of Worlds (世界の破壊者, Sekai no Hakaisha)
Movies
- Cho Kamen Rider Den-O & Decade Neo Generations: The Onigashima Warship (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)
- Kamen Rider Decade: All Riders vs. Dai-Shocker (劇場版 仮面ライダーディケイド オールライダー対大ショッカー, Gekijōban Kamen Raidā Dikeido: Ōru Raidā tai Daishokkā)
- Tribute to the Kamen Rider Series
- Kamen Rider × Kamen Rider W & Decade: Movie War 2010 (仮面ライダー×仮面ライダー W(ダブル)&ディケイド MOVIE大戦2010, Kamen Raidā × Kamen Raidā: Daburu ando Dikeido Mūbī Taisen Nisenjū)
- Kamen Rider × Kamen Rider × Kamen Rider The Movie: Cho-Den-O Trilogy: Episode Yellow: Treasure de End Pirates (仮面ライダー×仮面ライダー×仮面ライダー THE MOVIE 超・電王トリロジー: EPISODE YELLOW お宝DEエンド・パイレーツ, Kamen Raidā × Kamen Raidā × Kamen Raidā Za Mūbī: Chō Den'ō Torirojī Episōdo Ierō Otakara DE Endo Pairētsu)
- Kamen Rider × Super Sentai: Super Hero Taisen
(仮面ライダー×スーパー戦隊: スーパーヒーロー大戦, Kamen Raidā × Supā Sentai Supā Hīrō Taisen)
- Heisei Rider vs. Showa Rider: Kamen Rider Taisen feat. Super Sentai (平成ライダー対昭和ライダー 仮面ライダー大戦 feat.スーパー戦隊, Heisei Raidā Tai Shōwa Raidā Kamen Raidā Taisen feat. Sūpā Sentai)
Specials
- Kamen Rider Decade Super Adventure DVD: Protect! <The World of Televikun> (仮面ライダーディケイド 超アドベンチャー DVD 守れ!<てれびくんの世界>, Kamen Raidā Dikeido Chō Adobenchā Dībuidī: Mamore! <Terebikun no Sekai>)
- Tribute to the Televikun.
- Kamen Rider Decade: All Riders vs. Dr. Shinigami (仮面ライダーディケイド オールライダー対しにがみ博士, Kamen Raidā Dikeido Ōru Raidā tai Shinigami Hakase)
- Kamen Rider Decade Net Movies: All Riders Super Spin-off (ネット版 仮面ライダーディケイド オールライダー超スピンオフ, Nettoban Kamen Raidā Dikeido: Ōru Raidā Sūpā Supin'ofu)
- Tribute to the Kamen Rider Series, promotes Kamen Rider Decade: All Riders vs. Dai-Shocker
- Rider War: Prologue Special Edition (ライダー大戦・序章 特別編, Raidā Taisen: Joshō Tokubetsuhen)
- The Destroyer of Worlds Special Edition (世界の破壊者 特別編, Sekai no Hakaisha Tokubetsuhen)
- Rider Time: Kamen Rider Decade VS Zi-O -Decade Mansion's Death Game- (RIDER TIME 仮面ライダーディケイド VS ジオウ -ディケイド館のデス・ゲーム-, Raida Taimu: Kamen Raidā Dikeido Tai Ji-Ō -Dikeido-Kan no Desu Gēmu-)
- Tribute to Kamen Rider Decade and Kamen Rider Zi-O
- Rider Time: Kamen Rider Zi-O VS Decade -7 of Zi-O!- (RIDER TIME 仮面ライダージオウ VS ディケイド -7人のジオウ!-, Raidā Taimu: Kamen Raidā Ji-Ō Tai Dikeido -Nana-Nin no Ji-Ō-)
- Tribute to Kamen Rider Decade and Kamen Rider Zi-O
Stageshows
- 10th Anniversary Project: Masked Rider LIVE & SHOW (10周年プロジェクト 仮面ライダー LIVE & SHOW, Jū-Shūnen Purojekuto: Kamen Raidā RAIBU Ando SHŌ)
- Kamen Rider Decade: World Chaos (仮面ライダーディケイド 天下大乱, Kamen Raidā Dikeido Tenka Tairan)
- Kamen Rider Decade: Final Stage (仮面ライダーディケイド ファイナルステージ, Kamen Raidā Dikeido Fainaru Sutēji)