Tenchi Muyo! GXP

Tenchi Muyo! GXP was created as a 10th anniversary project for the Tenchi Muyo! franchise, and was the first entry produced after production shifted from Pioneer LDC to Vap and Nippon TV.

Unlike the prior two Tenchi Muyo! TV series, which used settings different from Masaki Kajishima's original storyline, GXP was made to conform to Kajishima's own continuity, making it what fans call 'Kajishima Tenchi'.

According to the afterword of a Kajishima-authored doujinshi published in August 2001, the project was originally developed under the working title 'GP no Takkyubin' (GP Home Delivery).

The story is set as a side story taking place about a year after the (at the time still unproduced) third OVA series of Tenchi Muyo! Ryo-Ohki, following the Galaxy Police headquarters and the GP Academy.

In the English dub continuity explained in the anime, the Galaxy Police originally intended to recruit Tenchi Masaki himself, but ended up mistakenly enlisting Seina Yamada instead.

A novelization titled 'Shin Tenchi Muyo! Ryo-Ohki Gaiden: Tenchi Muyo! GXP' began serialization in Fujimi Fantasia Bunko in April 2003, written and illustrated by Kajishima himself, filling in story details not covered in the anime; the anime-equivalent first part concluded with the 14th volume in April 2016, after which a second part called the 'Rensa (Simza) arc' began.

Several characters are noted as resembling or referencing characters from Kajishima's earlier work 'Dual! Parallel Trouble Adventure', including Kiriko, Miki and Karen resembling Mitsuki Sanada, and Seina himself resembling Yotsuga Kazuki, with the shared voice cast for characters like Miki/Sanada Mitsuki and Kirsche/Rara Mitsuki being described as a deliberate service to fans aware of the connection.

In-universe, the NB robot originally given to Seina malfunctions after modifications by Amane and gains a lecherous personality; the director Watanabe Shinichi usually makes cameo appearances in his own directed works, but in this case NB was not modeled after him but was instead a character Kajishima specifically designed for Watanabe.