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* ActingForTwo:
** Kiyone and Tennyo Masaki are both played by Creator/EmiShinohara.
** Creator/TakeshiAono voiced Katsuhito and Nobuyuki Masaki for the first three [=OVAs=].
** Sasami Masaki Jurai and Tsunami are both played by Creator/ChisaYokoyama.
** Besides replacing Creator/YukoMizutani as Mihoshi Kuramitsu from the fourth OVA onwards, Creator/MichieTomizawa also plays her mother Mitoto for her appearance in the fifth series.
** Miki Narahashi plays Taro and Kei Masaki.
* AlanSmithee: Until the twelfth episode, many of the English voice actors besides Jay Hopper frequently used pseudonyms. For example, Matt K. Miller (Tenchi) was billed as "Kermit Miller".
* AuthorsSavingThrow: Mikami Kuramitsu's matronly side came from Creator/ShinichiWatanabe during production of ''Anime/TenchiMuyoGXP''. Masaki Kajishima reportedly hated the direction Nabeshin brought the series to, and wanted to treat Mikami in the same BunnyEarsLawyer way as all her other relatives, thus the HardDrinkingPartyGirl in the fourth OVA and all subsequent appearances.
* BreakthroughHit: The first two [=OVAs=] marked Creator/PioneerLDC's start as an anime distributor and producer in both Japan and North America.
* CompletelyDifferentTitle: The series is called ''Chi ha bisogno di Tenchi?''[[note]]Who needs Tenchi?[[/note]] in Italy.
* CrossDressingVoices:
** Tenchi's younger self is voiced by Mari Mashiba.
** In the Italian dub of the [=OVAs=], Ryo-Ohki's cabbit form is voiced by the male Creator/FabrizioMazzotta.
* DirectedByCastMember:
** In the English dub of the first two [=OVAs=], Jack Fletcher was the ADR director and D3's voice actor.
** The Italian dub of the first two [=OVAs=] were directed by Fabrizio Mazzotta, who also voiced Ryo-Ohki's cabbit form.
* EditedForSyndication: In the United States, certain scenes from the first 12 episodes, as well as the ending themes and next episode previews, were cut from Cartoon Network's short-lived 2000-2002 run.
* ExecutiveMeddling: During the first OVA's production, Masaki Kajishima was originally planning to name the OVA after the titular cabbit. However, the sponsors were concerned about potential sales issues and at the suggestion of AIC's then-representative director Toru Miura, Kajishima included the ''Tenchi Muyo!'' title.
* ExiledFromContinuity: Since 2020, the fourth and fifth series are being streamed on Website/{{Crunchyroll}}, meaning that, among other things, it is not available on Creator/{{Funimation}}'s website.
* HeAlsoDid:
** Hiroki Hayashi, the co-creator and director of the first OVA, would later go on to create and direct another AIC series, ''Anime/ElHazardTheMagnificentWorld'', in 1995.
** Nahoko Hasegawa, the first OVA's scriptwriter, later worked on the OVA adaptation of ''Anime/AhMyGoddess''.
* InternationalCoproduction: While the fourth OVA's animation was still produced in Japan, the production committee consisted of companies from both Japan (Luxent, Bellplans, Pony Canyon Enterprise and Asia Animation Partners) and China (Youku Tudou and Yukin Trading).
* KeepCirculatingTheTapes:
** Pioneer released the first two ''Ryo-Ohki'' OVA series in North America on laserdisc, VHS, and DVD, but have since gone out of print. They wouldn't receive another re-release until December 18, 2012, when Funimation released the first two [=OVAs=] in a limited edition Blu-ray/DVD boxset.
** An edited version of the first 12 episodes aired on Creator/CartoonNetwork in North America in July 2000 and it hasn't been rebroadcast since January 16, 2002.
** At present, the NBCUEJ Japanese Blu-ray releases, as well as the Pioneer DVD Ultimate Edition boxset released in 1999, are the only official way to see the English dub of the episode 13.5 omake (which is absent from the Funimation release).
* LateExportForYou:
** The first two [=OVAs=] didn't reach Italy until 1997, five years after its initial Japanese release.
** Website/{{Crunchyroll}} began streaming the fourth OVA worldwide outside of Asia in June 2020, four years after it premiered in Japan and three months after Crunchyroll began releasing the fifth OVA.
* MarthDebutedInSmashBros: The characters from the Japan-exclusive ''Paradise War'' novels make an appearance in the fifth OVA.
* MeaningfulReleaseDate: The twelfth episode came out on June 25, 1995, which was also the same day the thirteenth episode of ''Anime/TenchiUniverse'' first aired on Creator/TVTokyo.
* MilestoneCelebration:
** Funimation's release of the third OVA coincided with the 10th anniversary of the second OVA's ending. Their 2012 release of the first two OVA series coincided with the 20th anniversary of the series' premiere.
** Creator/NBCUniversalEntertainmentJapan's Blu-ray releases of the first two OVA series coincided with the franchise's 25th anniversary.
** The fifth OVA's premiere took place in 2020, the year which celebrates the 25th anniversary of the second OVA's finale and ''Anime/TenchiUniverse'', as well as the 15th anniversary of the third OVA's premiere.
* MissingEpisode: In North America, the episode 13.5 omake is missing from Funimation's streaming website as well as their 2012 Blu-ray/DVD boxset.
* NoDubForYou: As of 2021, the fourth and fifth series have no English dubs, as opposed to the first three OVA series.
* NoExportForYou:
** The first three [=OVAs=] streamed on Funimation in North and South America, the UK, Ireland and Australasia.
** Many ''Tenchi Muyo!'' fans outside Japan don't view the entire series as a whole including the Doujinshi and Novels released by Kajishima. This causes them to miss out on important information, and the lack of this causes a severely ignorant case of AmericansHateTingle.
* TheOriginalDarrin: After being replaced for their brief appearance in ''GXP'', Matt K. Miller, Jennifer Darling, Creator/SherryLynn, Kate T. Vogt and Creator/DebiDerryberry respectively return as Tenchi Masaki, Ayeka Masaki Jurai, Sasami Masaki Jurai, Washu Hakubi and Ryo-Ohki for the 3rd OVA.
* TheOtherDarrin:
** In the Japanese version:
*** By the time of the fourth OVA's release, Ayeka's voice actress on all of her previous appearances, Yumi Takada, had retired from voice acting. As a result, she is now played by Creator/HaruhiNanao, reprising her role from ''Ai Tenchi Muyo!''.
*** Due to Creator/YukoMizutani's death in May 2016, Creator/MichieTomizawa became the ''de facto'' voice for Mihoshi starting with the fourth OVA. She would also replace Mizutani as Mitoto from ''Anime/TenchiMuyoGXP''.
*** Though Creator/TomokoKaneda reprised her role as Fuku from ''GXP'' for her appearance in the third OVA, she was replaced by Creator/ChieNakamura for her appearance in the fifth OVA.
*** Since Creator/TakeshiAono died of post-operative multiple cerebral infarctions in-between the third and fourth series, Ken Uo and Creator/KatsuyukiKonishi voice Katsuhito and Nobuyuki Masaki, respectively.
*** For the third OVA, Creator/IkukoSugita voiced Mikami Kuramitsu, reprising her role from ''GXP''. After Sugita's 2009 death, Creator/YokoSoumi voiced Mikami for all later appearances of the character; Airi {{hand wave}}s this in the fourth OVA episode "The Day Before the Party" by asking how Mikami switched back to her true, younger form.
*** For the fourth OVA, Creator/ShigeruMogi reprised his role as Seina Yamada from ''GXP''. Beginning with the fifth OVA, the character has been voiced by Creator/HirofumiNojima.
*** In the second OVA, Kei Masaki was voiced by Naoko Ishii. Due to her retirement, she was replaced by Miki Narahashi from the fourth OVA onwards.
** In the English dub:
*** Akie Masaki was voiced by Zita Campisi in the first OVA, with Washu's voice actress Kate T. Vogt replacing her in the second OVA.
*** For the first two OVA series, Azaka was voiced by Mark Tracy. Starting with the third OVA, he was replaced by Doug Stone, reprising his role from ''Anime/TenchiInTokyo''.
*** Kamidake was originally voiced by Phil Fox in his first appearances. He was replaced by Jack Fletcher for the seventh episode and the second OVA, and by Michael Sorich (also reprising his role from ''Tenchi in Tokyo'') for the third OVA.
*** For the third OVA, Creator/BobPapenbrook replaced Jay Hopper as Katsuhito Masaki, also reprising that role from ''Tenchi in Tokyo''.
*** Despite Creator/JenniferDarling coming back to voice Ayeka in the third OVA, she's been replaced as Lady Tokimi by Mari Devon.
*** Creator/MichaelMcConnohie replaced Jack Fletcher as D3 for the third OVA.
*** Creator/MonaMarshall and Creator/WendeeLee replace Creator/PetreaBurchard as the respective voices of Ryoko and Kiyone Masaki in the third OVA.
*** Grace Zandarski voiced Misaki and Funaho for the second OVA, but when they returned in the third OVA, Creator/KariWahlgren took over the roles.
* TheOtherMarty: In the English dub:
** Creator/MichaelSorich replaced Mark Tracy as Kazuhiko Amagasaki for the Toonami airing of the first OVA due to the conversation between Amagasaki and Tenchi in the first episode probably being far too vulgar for a kids network.
** R. Martin Klein replaced John [=DeMita=] as the voice of Seiryo for the Toonami airing of the second OVA due to [=DeMita=]'s performance turning Seiryo into a gay stereotype which the Toonami executives believed would result in complaints from the Gay Anti-Defamation League.
* OutOfOrder: Crunchyroll began streaming the fifth series on March 7, 2020, with the fourth one joining on June 2.
* PosthumousCredit: Funimation released the second and third volumes of the third ''Ryo-Ohki'' OVA months after Creator/BobPapenbrook's tragic death.
* RoleReprise:
** Since the third OVA, many of the ''Anime/TenchiMuyoGXP'' cast reprised their roles, including Creator/YukariNozawa as Seto Kamiki Jurai, Creator/MarikoSuzuki as Amane Kaunaq, Creator/SakikoTamagawa as Airi Masaki, Creator/YukoNagashima as Minaho Masaki, Creator/KumiSakuma as Kiriko Masaki, Creator/HisayoshiSuganuma as Kai Masaki, Creator/HikaruMidorikawa as Misao Kuramitsu, Creator/AyaHisakawa as Ryoko Balta, Creator/NaoTakamori as Gyokuren, Creator/ShihoKawaragi as Karen, Creator/NanaMizuki as Neju Na Melmas and Creator/KeikoOnodera as Mashisu Makibi.
** From the fourth OVA onwards, Haruhi Nanao reprises her role as Ayeka Masaki Jurai from ''Ai Tenchi Muyo!''.
** Creator/HisakoKyoda voiced Akie Masaki in the first two [=OVAs=] and reprised the role 13 years later for her appearance in the fourth OVA.
** In the fifth OVA, [[spoiler:the older Kenshi Masaki was reprised by Creator/HiroShimono for the first time since ''Anime/TenchiMuyoWarOnGeminar'' (2009)]].
** In the third OVA's English dub, Creator/BobPapenbrook and Creator/RebeccaForstadt reprise their respective roles as Katsuhito (and Nobuyuki) Masaki and Mihoshi Kuramitsu from ''Tenchi in Tokyo'' and Creator/MonaMarshall reprises her role as Ryoko from ''Tenchi Muyo GXP''. For Papenbrook, it would be the final time he voiced his roles before his tragic death in 2006.
* SequelGap: The third OVA made its debut in 2004, nine years after the second one was released. Nearly eleven years later, the fourth OVA was released.
* StudioHop:
** In Japan, the first two [=OVAs=] were produced and released by Creator/PioneerLDC; when Creator/NBCUniversal acquired Pioneer LDC/Geneon from Dentsu in 2008, they acquired these [=OVAs=] as well. For the third OVA, VAP took over as producer/distributor. The fourth and fifth OVA series were distributed by Hobibox.
** The first two [=OVAs=] were released in North America by Pioneer Entertainment USA (which would later be renamed Geneon Entertainment USA after Dentsu's buyout of the company). Funimation released the third OVA in 2005 and would later go on to release the first two [=OVAs=] five years after Geneon shut down its North American division in 2007.
** The first three [=OVAs=] are being streamed on Funimation's website in North America while (now Sony-owned) Website/{{Crunchyroll}} are exclusively streaming the fourth and fifth [=OVAs=] worldwide outside of Asia. As of 2021, the fourth and fifth series are the only animated ''Ryo-Ohki'' entries not licensed by Funimation, who owns the North American rights to the first three [=OVAs=] as well as several ''Tenchi Muyo!'' entries previously rescued by the company.
* SwanSong: The third OVA was Ikuko Sugita's final appearance as Mikami Kuramitsu before her 2009 death, as well as Creator/TakeshiAono's final appearance as Katsuhito and Nobuyuki Masaki before his 2012 death.
* TwoVoicesOneCharacter:
** Yosho Masaki Jurai and his Katsuhito Masaki disguise are voiced by two separate actors.
** In the Italian dub, Ryo-Ohki's cabbit form is voiced by Fabrizio Mazzotta and her human form is voiced by Gilberta Crispino.
* WordOfGod: Tenchi [[MarryThemAll marries everyone including Ryo-Ohki]].
** Recent Doujinshi have been released that show Ryoko, Ayaka, Ryo-ohki, Mihoshi, and Noike's daughters and their relationships with Seina's 3 sons by Kiriko, Amane, and Ryoko Balta all of whom were born before ''Tenchi Muyo: War on Geminar''. A picture of them can be found at http://postimg.org/image/qssdo16hn/
* YouSoundFamiliar:
** Miki Narahashi initially voiced Taro in the second OVA and would later voice Kei Masaki from the fourth OVA onwards.
** Creator/KatsuyukiKonishi voiced Sorunaru in the third OVA and would later go on to voice Nobuyuki Masaki starting with the fourth OVA.
** From ''Anime/DualParallelTroubleAdventure'': Creator/RieTanaka (Mitsuki Sanada) is Miki Steinbeck, Creator/MegumiToyoguchi (Mitsuki Rara) is Kirche and Creator/ChieNakamura (Yayoi Schwael) is the second Fuku.
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