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Kamen Rider Heisei Generations Forever (仮面ライダー平成ジェネレーションズ FOREVER, Kamen Raidā Heisei Jenerēshonzu Fōebā)^[3] is a 2018 Japanese superhero film in the Movie War line of the Kamen Rider Series. It serves as a crossover between the television series Kamen Rider Zi-O and Kamen Rider Build and is the third film of the Generations series. Aside the casts of Zi-O and Build, the casts of Kamen Rider Den-O and Kamen Rider W also participate, as well as some lead actors from other Kamen Rider Series performing voice-only cameos.^[4] The film was released nationally in Japan on December 22, 2018. This is the last Heisei-era Kamen Rider movie, released four months before the 2019 Japanese imperial transition.

Sougo Tokiwa/Kamen Rider Zi-O and Sento Kiryu/Kamen Rider Build must join forces with all the Kamen Riders of the Heisei era against Tid, a Super Time Jacker who intends to erase the entire history of Heisei Kamen Riders.

Zi-O cast

• Sougo Tokiwa (常磐 ソウゴ, Tokiwa Sōgo): So Okuno (奥野 壮, Okuno Sō)
• Geiz Myokoin (明光院 ゲイツ, Myōkōin Geitsu): Gaku Oshida (押田 岳, Oshida Gaku)
• Tsukuyomi (ツクヨミ): Shieri Ohata (大幡 しえり, Ōhata Shieri)
• Woz (ウォズ, Wozu): Keisuke Watanabe (渡邊 圭祐, Watanabe Keisuke)
• Junichirō Tokiwa (常磐 順一郎, Tokiwa Jun'ichirō): Katsuhisa Namase (生瀬 勝久, Namase Katsuhisa)
• Owada (小和田): Reo Suzuki (鈴木 励和, Suzuki Reo)
• Classmate: Souryu Nishi (西 蒼竜, Nishi Sōryū)

Build cast

• Sento Kiryu (桐生 戦兎, Kiryū Sento): Atsuhiro Inukai (犬飼 貴丈, Inukai Atsuhiro)
• Ryuga Banjo (万丈 龍我, Banjō Ryūga): Eiji Akaso (赤楚 衛二, Akaso Eiji)
• Misora Isurugi (石動 美空, Isurugi Misora): Kaho Takada (高田 夏帆, Takada Kaho)
• Kazumi Sawatari (猿渡 一海, Sawatari Kazumi): Kouhei Takeda (武田 航平, Takeda Kōhei)
• Gentoku Himuro (氷室 幻徳, Himuro Gentoku): Kensei Mikami (水上 剣星, Mikami Kensei)

Returning cast

• Ryotaro Nogami (野上 良太郎, Nogami Ryōtarō): Takeru Satoh (佐藤 健, Satō Takeru)
• Owner (オーナー, Ōnā): Kenjirō Ishimaru (石丸 謙二郎, Ishimaru Kenjirō)
• Master of Fuumen (風麺マスター, Fūmen Masutā): Hiroshi Doki (道木 広志, Dōki Hiroshi)

Heisei Generations Forever cast

• Ataru Hisanaga (久永 アタル, Hisanaga Ataru): Nayuta Fukuzaki (福崎 那由他, Fukuzaki Nayuta)
• Shingo Hisanaga (久永 シンゴ, Hisanaga Shingo): Taiyo Saito (斎藤 汰鷹, Saitō Taiyō)
• Tid (ティード, Tīdo): Shunsuke Daitō (大東 駿介, Daitō Shunsuke)
• Ataru's father: Hiroaki Nakagawa (中川 ひろあき, Nakagawa Hiroaki)
• Ataru's mother: Erina Takata (高田 衿奈, Takata Erina)
• Young Ataru: Yuugen Okamoto (岡本 夕弦, Okamoto Yūgen)

• Futaros (フータロス, Fūtarosu): Kenichi Takitō (滝藤 賢一, Takitō Ken'ichi)
• 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)
• Another Double (アナザーW(ダブル), Anazā Daburu): Kentarō Itō (伊藤 健太郎, Itō Kentarō)
• Kamen Rider Agito (仮面ライダーアギト, Kamen Raidā Agito): Toshiki Kashu (賀集 利樹, Kashū Toshiki)^[4]
• Kamen Rider Ryuki (仮面ライダー龍騎, Kamen Raidā Ryūki): Takamasa Suga (須賀 貴匡, Suga Takamasa)^[4]
• Kamen Rider Decade (仮面ライダーディケイド, Kamen Raidā Dikeido): Masahiro Inoue (井上 正大, Inoue Masahiro)^[4]
• Kamen Rider Ghost (仮面ライダーゴースト, Kamen Raidā Gōsuto): Shun Nishime (西銘 駿, Nishime Shun)^[4]

• "Kamen Rider Heisei Generations FOREVER Medley D.A. Re-Build Mix" (仮面ライダー平成ジェネレーションズFOREVER メドレー D.A. RE-BUILD MIX, Kamen Raidā Heisei Jenerēshonzu Fōebā Medorē Dī Ē Ribirudo Mikkusu)
  • Arrangement: Daisuke Asakura

A medley of the opening theme songs from all 20 Heisei Kamen Rider television series from Kamen Rider Kuuga to Kamen Rider Zi-O.

Kamen Rider Heisei Generations Forever grossed $12,587,899 at the box office.^[2]

• Official website