, is an anime, light novel, and manga series created by Masaki Kajishima and Hiroki Hayashi about a boy named Tenchi Masaki, which has grown into a larger franchise. Tenchi Muyo! was one of the early successes for AIC, the animation company behind it, which went on to create El-Hazard, Battle Athletes, Oh My Goddess!, Dual! Parallel Trouble Adventure and many other anime series.
The original series, Tenchi Muyo! Ryo-Ohki, is a six episode Original Video Animation (OVA) released in Japan in 1992–93. As its popularity grew, it spurred a seventh episode (also known as the Tenchi Special) and a stand-alone Mihoshi Special. In 1994-95, the second OVA series (episodes 8-13) was released, featuring episodes 8–13. A third OVA series (episodes 14–19) was released from 2003-2005, followed by a special twentieth episode.
The canon accepted by series creator Kajishima are the three Ryo-Ohki OVAs, the Tenchi Muyo! GXP: Galaxy Police Transporter series and associated novels, and the novels Shin Tenchi Muyo! Jurai, Shin Tenchi Muyo! Yosho, and Shin Tenchi Muyo! Washu. There are also a number of dōjinshi by and interviews with Kajishima, as well as a companion book, 101 Questions and Answers of Tenchi Muyo! Ryo-Oh-Ki.
Ryo-ohki OVA 1, the Mihoshi Special, the Tenchi Muyo! Ryo-ohki Manatsu no Eve film, the Tenchi Muyo! Ryo-ohki Manatsu no Carnival radio drama, and thirteen self-written novels.
Hasegawa also worked on the TV series, which includes her characters Kiyone and (in the movies) Achika, but the TV series is not considered to be in the same continuity as the film. Notably, Hasegawa considers the Mihoshi Special to be canonical, with the other two versions of the canon of the series declaring the storyline to be, for different reasons, non-canon.
Called the "Negishi canon", after director Hiroshi Negishi, the canon includes: Tenchi Muyo! TV (26 episodes, titled Tenchi Universe in English), and the films Tenchi Muyo! in Love and Tenchi Muyo! in Love 2: Haruka Naru Omoi, as well as a manga associated with the latter film called Tenchi Muyo! In Love 2: Eternal Memory''
Shin Tenchi Muyo! (titled Tenchi in Tokyo in English), was a 1997 TV series that ran for 26 episodes. It borrowed characters and some plot devices from the original Tenchi Muyo series. It centered on Tenchi's high school adventures in Tokyo.
Unlike most anime/manga combinations, for Tenchi the anime came first, and the manga is considered non-canon. It is based on OVA series 1 and 2. Since the manga originally began in Japan before the release of OVA 2, the OVA 2 elements are not introduced immediately at the beginning. Because the manga is non-canon, new elements introduced in the manga do not carry over to the anime.
The second is Tenchi Muyo! GXP, which was released in Japan in 2001. The series takes place during the Kajishima version of the OVA continuity, and is set a year after the events of the third OVA series (despite being released first chronologically). The main character of this twenty-six episode TV series is Seina Yamada, a friend of Tenchi Masaki who accidentally joined the Galaxy Police. Many characters from Tenchi Muyo! Ryo-ohki make appearances in this series, including the use of Seiryo as a major character and a full-fledged Tenchi Muyo! crossover in episode 17.
Sasami: Magical Girl Club, shown in Japan in 2006, is the third spin-off with Sasami (known here as Sasami Iwakura), as the main character.
The series Dual! Parallel Trouble Adventure is related to the Tenchi Muyo universe, due to the blatant use of the "Lighthawk Wings" associated with the Jurai dynasty in Tenchi Muyo. Mecha Jinv from Dual! appear in Tenchi Muyo! GXP, Kiyone, Ramia, and Misao appear in a brief easter egg cameo in the series' OVA special, and there is much speculation concerning the ancient civilization that the character "D" is from. Kajishima has hinted that Dual! does, in fact, relate to Tenchi Muyo!. The creator of both DUAL! and Tenchi Muyo!, Masaki Kajishima, confirmed that DUAL! is in fact an alternate version of the Tenchi Muyo! universe.