Kikai Sentai Zenkaiger

Kikai Sentai Zenkaiger (機界戦隊ゼンカイジャー) is a Japanese tokusatsu television series, the 45th entry in Toei's long-running Super Sentai series, and the second produced in the Reiwa era. Additionally, it commemorates the 45th anniversary of the Super Sentai franchise and is the second special anniversary series following Kaizoku Sentai Gokaiger.

The show succeeded Mashin Sentai Kiramager, joining Kamen Rider Saber, and later, Kamen Rider Revice in the Super Hero Time line-up on TV Asahi on March 7, 2021. The show's name comes from the titular team's catchphrase, "Zenryoku Zenkai" (全力全開). A direct sequel, titled Avataro Sentai Donbrothers, aired following the finale.

Zenkaiger also aired in South Korea as Power Rangers Zenkaiger.

Plot
One month ago, a strange phenomenon suddenly fused the human world with the parallel world of Kikaitopia, who had previously conquered and sealed off various universes, including those of the previous 44 Super Sentai. Despite this, humans and Kikainoids quickly get along and live peacefully together.

In the present, however, their lives are threatened by Kikaitopia's evil rulers, the Tozitend Dynasty, who seek to conquer all parallel worlds. To face this new threat, a brave and energetic young man named Kaito Goshikida inherits the powers of all previous Super Sentai. Transforming into Zenkaizer, he joins forces with the Kikainoids Juran, Gaon, Magine, and Vroon to save the multiverse from Tozitend and find Kaito's missing parents as the Zenkaigers. The conflict later intensifies with the arrival of the World Pirates. Led by Zocks Goldtsuiker, who can transform into Twokaizer, the World Pirates oppose Tozitend in pursuit of their own objectives and occasionally ally with the Zenkaigers for the sake of it.

Production
The trademark for the series was filed by Toei Company on September 8, 2020.

According to producer Shinichiro Shirakura, the show's diversity in its titular members, featuring a human and four Kikainoids, is due to the Super Sentai series' recurring themes of diversity in its group of protagonists while maintaining strong characters. The reason why Zenkaizer was chosen as the leader despite being colored white is to ensure that he would stand out in future crossovers when grouped alongside other Red Rangers. The four Kikainoids' ranger form were based on the mecha robot of previous super sentai series. Zenkai Zyuran was based on Kyōryū Sentai Zyuranger mecha Daizyujin, Zenkai Gaon was based on Hyakujuu Sentai Gaoranger mecha robot Gao King, Zenkai Magine was based on Mahō Sentai Magiranger mecha Magi King, Zenkai Vroom was based on GoGo Sentai Boukenger mecha DaiBouken. Although Zenkaiger is open to the idea of featuring past heroes in certain episodes, Shirakura mentioned that it will not be done in a similar way to Kaizoku Sentai Gokaiger. As members of the Zenkaigers combine to form the series' mecha, ZenkaiOh, the original plan was for their combined forms to appear human-sized at first, but as the show needed to keep up with the toy releases, this idea was scrapped and eventually implemented in the sequel series Avataro Sentai Donbrothers through the titular group's mecha, Don Onitaijin.

After series voice actor Tatsuhisa Suzuki chose to go on hiatus, his role as Gege was rendered voiceless between episodes 21 and 25. Toei later announced Masaya Fukunishi will take over the role of Gege from episode 25 onward.

Reception
Kikai Sentai Zenkaiger is ranked 19th place in the 2021's "100 Internet Buzzwords" in Japan, held by Nico Nico Pedia and Pixiv Encyclopedia. The physical award is given to Toei's producers of the series, Shinichiro Shirakura, Naomi Takebe, Kōichi Yada and Akihiro Fukada during the award ceremony on December 15, 2021.

Red Battle! All Sentai Great Assemble!!
Kikai Sentai Zenkaiger the Movie: Red Battle! All Sentai Great Assemble!! (機界戦隊ゼンカイジャー THE MOVIE 赤い戦い！オール戦隊大集会!!) is a film which serves as the Zenkaigers' official debut and was released in Japanese theaters on February 20, 2021, as part of Super Sentai Movie Ranger 2021 (スーパー戦隊MOVIEレンジャー2021), alongside Mashin Sentai Kiramager the Movie: Be-Bop Dream and Kishiryu Sentai Ryusoulger Special: Memory of Soulmates. Naoya Makoto, Kei Hosogai, and Jingi Irie reprise their respective roles as Tsuyoshi Kaijo/Akarenger, Basco Ta Jolokia, and Zamigo Delma. Additionally, Nobutoshi Canna and Megumi Han reprise their respective voice roles as Bangray and Kyuemon Izayoi. The events of the film take place between episode 6 of the regular series and the companion web series Kikai Sentai Zenkaiger Spin-Off: Zenkai Red Great Introduction!.

Super Hero Senki
Saber + Zenkaiger: Super Hero Senki (セイバー＋ゼンカイジャー スーパーヒーロー戦記) is a crossover film released on July 22, 2021, starring the cast from Zenkaiger and Kamen Rider Saber, as well as featuring characters from past entries of the franchises involved. The film is part of the celebrations for both the 45th anniversary of the Super Sentai franchise and the 50th anniversary of the Kamen Rider franchise, and serves as the final crossover between them. Actors Fuku Suzuki and Ayumi Tanida portrayed Shotaro Ishinomori and the film's main antagonist, Asmodeus, respectively. Moreover, Kenjirō Ishimaru of Kamen Rider Den-O; Takashi Ukaji of Kamen Rider OOO; So Okuno of Kamen Rider Zi-O; Fumiya Takahashi of Kamen Rider Zero-One; Shogo Suzuki of Samurai Sentai Shinkenger; Atomu Mizuishi of Mashin Sentai Kiramager; and Hiroshi Fujioka of Kamen Rider (1971 - 1973) reprise their respective roles while Naoya Makoto of Himitsu Sentai Gorenger; Toshihiko Seki, Kōji Yusa, Masaki Terasoma, and Kenichi Suzumura of Kamen Rider Den-O; Tetsu Inada of Tokusou Sentai Dekaranger; and M·A·O and Hiroshi Kamiya of Uchu Sentai Kyuranger; and Rikiya Koyama of Kamen Rider Zi-O reprise their respective voice roles. Additionally, the two main characters of the then-upcoming Kamen Rider Revice made their first appearances and a special film for the series was double billed with Super Hero Senki. The events of the film take place between the two-part Movie Release Commemorative Combo Special and episode 21 of the series.

Special episodes

 * Kikai Sentai Zenkaiger Spin-Off: Zenkai Red Great Introduction! (機界戦隊ゼンカイジャー スピンオフ ゼンカイレッド大紹介！) is a two-episode web-exclusive series released on Telasa on March 21, 2021. Additionally, Satomi Hirose of Ninja Sentai Kakuranger makes an appearance. The events of the special take place between Kikai Sentai Zenkaiger the Movie: Red Battle! All Sentai Great Assemble!! and episode 7 of the series.
 * 1) Red Challenge! The Zenkaigers Annihilated?! (赤い挑戦！ゼンカイジャー全壊?!)
 * 2) White Counterattack! Full Recovery of the Zenkaigers!! (白い逆襲！ゼンカイジャー全快!!)
 * Zenkai Mini Theater (ゼンカイ豆劇場) is a twelve-episode puppetry short series included as part of the Blu-ray releases of Kikai Sentai Zenkaiger.
 * 1) I Learn the Powers of the Predecessors!: Zyuranger Part (パイセンの力、勉強します！〈ジュウレンジャー編〉)
 * 2) Can You Name All the Super Sentai? (スーパー戦隊いえるかな？)
 * 3) Miss Magical Girl's Solitary Gourmet (孤高のミス魔女っ子グルメ)
 * 4) Suspicions of Hyakujuu Sentai: Gaoranger Part (百獣戦隊の疑惑〈ガオレンジャー編〉)
 * 5) Zenkais of the Wilderness (荒野のゼンカイども)
 * 6) Reincarnation Panic! (転生・パニック！)
 * 7) 5 Seconds Before Getting Seriously Excited: Magiranger Part (マジで高まる5秒前〈マジレンジャー編〉)
 * 8) Sudden Mini Theater (豆劇場は突然に)
 * 9) Zenkai House Death Game (ゼンカイ館のデスゲーム)
 * 10) The Endless Inquiry Spirits: Boukenger Part (果てなき探求〈ボウケンジャー編〉)
 * 11) It's Good, Mahjong, It's Awesome! (いーじゃん、まーじゃん、すげーじゃん！)
 * 12) If We Met in Court Again (また法廷で会えたなら)
 * Twokaizer × Gokaiger: The Tanuki-Charmed June Bride (ツーカイザー×ゴーカイジャー ～ジューンブライドはたぬき味～) is a web-exclusive crossover series released on Toei Tokusatsu Fan Club on June 5, 2022, featuring characters from Zenkaiger and Kaizoku Sentai Gokaiger. Ryota Ozawa, Yui Koike, and Junya Ikeda return to reprise their respective roles as Captain Marvelous/Gokai Red, Ahim de Famille/Gokai Pink, and Gai Ikari/Gokai Silver respectively. The events of the specials take place after Zenkaiger vs. Kiramager vs. Senpaiger.

Zenkaiger vs. Kiramager vs. Senpaiger
Kikai Sentai Zenkaiger vs. Kiramager vs. Senpaiger (機界戦隊ゼンカイジャーVSキラメイジャーVSセンパイジャー) is a V-Cinema release that features a crossover between Zenkaiger and Mashin Sentai Kiramager. The V-Cinema received a limited theatrical release on April 29, 2022, followed by its DVD and Blu-ray release on September 28, 2022. Additionally, Ryota Ozawa of Kaizoku Sentai Gokaiger and Asahi Ito of Kaitou Sentai Lupinranger VS Keisatsu Sentai Patranger reprised their respective roles as Captain Marvelous/Gokai Red and Kairi Yano/Lupin Red. The events of the V-Cinema take place after the final episode of the series.

Donbrothers vs. Zenkaiger
Avataro Sentai Donbrothers vs. Zenkaiger (暴太郎戦隊ドンブラザーズVSゼンカイジャー) is an upcoming V-Cinema release that features a crossover between Zenkaiger and Avataro Sentai Donbrothers. The V-Cinema is scheduled for a limited theatrical release on May 3, 2023, followed by its DVD and Blu-ray release on September 27, 2023. This film is divided into three acts of the story, focusing on the Donbrothers and Zenkaigers after their respective series, before uniting in the final act. The events of the V-Cinema take place a year after the final episode of Donbrothers.

Cast

 * Kaito Goshikida (五色田 介人): Kiita Komagine (駒木根 葵汰)
 * Juran (ジュラン) : Shintarō Asanuma (浅沼 晋太郎)
 * Gaon (ガオーン): Yuki Kaji (梶 裕貴)
 * Magine (マジーヌ): Yume Miyamoto (宮本 侑芽)
 * Vroon (ブルーン): Takuya Satō (佐藤 拓也)
 * Zocks Goldtsuiker (ゾックス・ゴールドツイカー): Atsuki Mashiko (増子 敦貴)
 * Stacy (ステイシー): Ryo Sekoguchi (世古口 凌)
 * Flint Goldtsuiker (フリント・ゴールドツイカー): Hinami Mori (森 日菜美)
 * Secchan (セッちゃん): Misato Fukuen (福圓 美里)
 * Cutanner Goldtsuiker (カッタナー・ゴールドツイカー): Ryōta Suzuki (鈴木 崚汰)
 * Ricky Goldtsuiker (リッキー・ゴールドツイカー): Satsumi Matsuda (松田 颯水)
 * Bokkowaus (ボッコワウス): Jouji Nakata (中田 譲治)
 * Barashitara (バラシタラ): Kenji Nomura (乃村 健次)
 * Izirude (イジルデ): Masanori Takeda (竹田 雅則)
 * Gege (ゲゲ): Tatsuhisa Suzuki (鈴木 達央), Masaya Fukunishi (福西 勝也)
 * Isao Goshikida (五色田 功): Daijiro Kawaoka (川岡 大次郎)
 * Mitsuko Goshikida (五色田 美都子): Marie Kai (甲斐 まり恵)
 * Yatsude Goshikida (五色田 ヤツデ): Ikue Sakakibara (榊原 郁恵)
 * Zenkaiger Equipment Voice: Lenne Hardt
 * Geardalinger Voice: Tomokazu Seki (関 智一)
 * Zenryoku Zenkai Cannon Voice: Banjō Ginga (銀河 万丈)
 * Narration: Goblin (ゴブリン)

Guest cast

 * Karen Hatsumori (初森 花恋): Mei Fukuda (福田 愛依)
 * Reika Shindai (神代 玲花): Mei Angela (アンジェラ 芽衣)
 * Ryoga Shindai (神代 凌牙): Ken Shonozaki (庄野崎 謙)
 * Don Momotaro (ドンモモタロウ): Kouhei Higuchi (樋口 幸平)

International broadcast

 * Zenkaiger also aired in South Korea as Power Rangers Zenkaiger.
 * In the Chinese-speaking world, Both Mandarin (Taiwan dialect) and Cantonese dubs were produced and aired in Taiwan and Hong Kong respectively.
 * In Taiwan, the series aired with a Taiwanese Mandarin dub on June 17, 2022 until May 26, 2023 with all episodes dubbed, airing on EBC Yoyo.
 * In Hong Kong, the series aired with a Cantonese Chinese dub originally intended for a March 13, 2022 premiere date, however due to the pandemic it was pushed back causing it to air on June 5, 2022 on TVB Jade until May 28, 2023 with all episodes dubbed. This would be the last series in Hong Kong to air on TVB Jade, as the following entry would air on ViuTV and TVB cutting back on the amount of Children's program they air.

Theme song

 * "Zenryoku Zenkai! Zenkaiger" (全力全開！ゼンカイジャー)
 * Lyrics: Mike Sugiyama (マイク スギヤマ)
 * Composition & Arrangement: Kentaro Sonoda (園田 健太郎)
 * Artist: Takeshi Tsuruno (つるの 剛士)
 * Chorus: Kotonomi Children's Chorus (ことのみ児童合唱団)