- Anime First: Manga were made later.
- Cash Cow Franchise: On an international level.
- The Original Darrin: In the English dub of Ai Tenchi Muyo!, Petrea Burchard reprises her role of Ryoko after Mona Marshall replaced her for the third OVA.
- The Other Darrin:
- In the 3-part Magical Girl Pretty Sammy OVA, Lara Cody also filled in for Sherry Lynn as Tsunami for two episodes for unknown reasons. Debi Derryberry also replaced Sue Turner-Cray as Misao (and her alter ego, Pixy Misa), and Rebecca Forstadt replaced Ellen Gerstell as Sasami's mother.
- When it came time to dub Tenchi Muyo! GXP, FU Nimation tried getting the original cast back for their cameos in episode 17, even outsourcing the entire dub to a Los Angeles studio, but were unable to. The only reprisals were Forstadt as Mihoshi and Papenbrook as Katsuhiko Masaki, the second voices for those characters, and the following substitutes happened:
- Tenchi: Christopher Corey Smith (instead of Matt K. Miller)
- Ryoko: Mona Marshall (instead of Petrea Burchard)
- Ayeka: Rebecca Forstadt (instead of Jennifer Darling)
- Sasami: Kari Wahlgren (instead of Sherry Lynn)
- Washu: Jessica Gee (instead of Kate T. Vogt)
- Ryo-Ohki: Mona Marshall (instead of Debi Derryberry)
- Funimation was able to secure the entire cast for OVA 3, except for Petrea Burchard due to her union's increasing wage scale, so Mona Marshall became Ryoko's regular voice actress for that, until Burchard reprised her role in Ai Tenchi Muyo!. Also, Mona Marshall had voiced Noike for her brief cameo in GXP, Kari Wahlgren became her permanent voice for OVA 3.
- When Funimation picked up Ai Tenchi Muyo!, most of the original cast returned. However, Washu's voice actress, Kate Vogt, had moved away to Portland, Oregon; she was replaced by Karen Strassman. Jennifer Darling, Ayeka's voice actress, was also unavailable, and she was replaced by Cherami Leigh.
- In Japanese, Yumi Takada retired from voice acting in 2009, leading to Haruhi Nanao note to replace her as Ayeka in Ai Tenchi Muyo! and the 4th OVA series.
- This may also happen to Bob Papenbrook as Katsuhito and Nobuyuki Masaki following the actor's passing from chronic lung complications in 2006.
- Relationship Voice Actor: Quatre, Noin, and Relena worked together in Tenchi Universe and Tenchi in Tokyo.
- Talking to Himself:
- Nobuyuki and Katsuhito are voiced by Takeshi Aono. Averted in the fourth OVA, where the two are respectively played by Katsuyuki Konishi and Ken Uo. In the English dub, Jay Hopper voiced both until he left the show, and Bob Papenbrook began voicing both as well.
- Tsunami and Sasami in both the Japanese and English versions. Also a bit of a meta-example, not only for fitting the trope itself but for fitting its title literally thanks to Sasami and Tsunami's fusion link.
- Trope Namer: This anime has named the following tropes:
- Digital Bikini - though this was because Cartoon Network had to find a way to air plot-relevant scenes that had nudity in it, as editing them out would lead to plot holes, so they took a page from many an edited for TV broadcast movie featuring nudity or revealing clothing and used digital altering.
- Really 700 Years Old
- The Wiki Rule: The Tenchi Muyo Wiki.
- Word of God: OVA continuity. In the end, Tenchi will marry everyone. That's why we used to call it the Tenchi Solution.
Trivia / Tenchi Muyo!