Tenchi Muyo! GXP (天地無用! GXP Tenchi Muyō!, Jī Ekkusu Pī: "Galaxy Police Transporter"), is a 26-episode anime television series directed by Shinichi Watanabe and produced by AIC. It is the fourth television series based on the Tenchi Muyo! series and a spinoff of the original Tenchi Muyo! Ryo-Ohki OVA series that began in 1992.
Tenchi Muyo GXP follows Seina Yamada, a teenage boy living in rural Okayama and a friend of Tenchi Masaki who inadvertently joins the Galaxy Police due to both his penchant for bad luck and being forced to by his family. Soon, Seina becomes the captain of his own Galaxy Police ship, the Kamidake, and is accompanied by four women as crewmates: Amane Kaunaq, a former supermodel and the woman who recruited Seina; Kiriko Masaki, Seina's childhood friend who lives a double-life working for the Galaxy Police, Ryoko Balta, a space pirate of the Daluma Guild and named after the infamous Ryoko Hakubi; and Neju Na Melmas, an exceptionally powerful telepath despite her childish appearance. Unfortunately for Seina, all four women fall in love with him in the process.
Tenchi Muyo! GXP was originally broadcast in Japan during 2002, where all 26 episodes were initially aired from April 3 to September 25. The episodes were also slightly edited for airing on Japanese TV with some changes in content for the DVD releases.
Tenchi Muyo GXP contains several references to Masaki Kajishima's earlier works, besides Tenchi Muyo!:
- The novels reveal how deeply and direct its connection to Dual! Parallel Trouble Adventure are. It is revealed that Dual occurred up to a billion years prior to the start of the main Tenchi series and after going into space, the cast become the progenitors of what becomes the Great Prehistoric Civilization. Their civilization seeded the galaxy with the human genome and, somehow, recurring cultural norms that result in future worlds, languages, tools, foods, etc. replicating their own.
- Yamada Seina is the direct reincarnation of Kazuki Yotsuga.
- Zinv from GXP is the same Zinv from Dual. Its arch-enemy, HIMC, also appears in later novels.
- D survives into GXP's time by having her astral copied into an AI, which slept inside Zinv until Seina rediscovered it.
- Miki Steinbeck and her father Hiroshi Manada are confirmed to be direct reincarnations of Mitsuki Sanada and Ken Sanada. Fuku and Kirche, are also heavily implied to be direct reincarnations of Yayoi Schwael and Mitsuki Rara by a specific passage in Novel 13, chapter 7.
- In Tenchi OVA 5, Fuku, Miki, and Kirche are voiced by the same voice actors of their counterparts in Dual, D has not not spoken, as it seems her previous voice actor has retired.
- All of Seina's girlfriends/potential-girlfriends and wives tend to follow a repeating astral pattern that parallels the attributes of the four girls in Dual.
- The pattern of Mitsuki Sanada is represented by Kiriko Masaki, Karen, Tsukiko, and others.
- The pattern of Yayoi Schwael is represented by Amane Kaunaq, Gyokuren, Mikami and others.
- The pattern of Mitsuki Rara is represented by Ryoko Balta, Suiren, Ringo and others.
- The pattern of D is represented by Neju Na Melmas, Hakuren, Kuis Panta and others.
- The title of episode 24 is a direct reference to Dual.
- Kazuki Yotsuga shares the same name as Tenchi's great-great-grandfather. If they have a connection beyond their name, it has not yet been revealed.
- The Shank pirate guild (or "Shiunk", depending upon translation) were originally the main villains of the hentai series Spaceship Agga Ruter. They also show up as minor villains in the True Tenchi Muyo! novels, Volume 1: Jurai and Volume 3: Washu.
- In episode 20, Neju comments the giant ants chasing the girls on Jurai might be Bugrom, a reference to the race of giant insects from El-Hazard (another anime series produced by AIC).
- When Seiryo Tennan's original good luck pirate ship, Unko was launching first time, the ship is briefly shown firing up its main engine nozzel. The ship's nozzel is parody of Space Cruiser Yamato.
- In the English dubbed version of Tenchi Muyo GXP, the last episode, the original Japanese language theme of "GXP is heard in final scene of the show.
- The anime appears to only last a few months to a year at most, though the novels reveal it covers two years.