An official website has opened for a fourth season of the original anime Tenchi Muyou! Ryououki. The series is the original work of the Tenchi Muyou! franchise, which spans three OVA seasons, four spin-off TV series, and various movie, manga, and light novel adaptations.

Tenchi Muyou! Ryououki was created by Masaki Kajishima, and 20 episodes were released as OVAs between 1992 and 2000. The series was previously licensed in North America by Pioneer Entertainment (later Geneon USA) until the business unit closed in 2007. FUNimation Entertainment rescued that license in 2008 after reaching an agreement with Geneon to distribute its titles.

Further information will be revealed at a fan appreciation event to be held on November 28, 2015. It is a double event to commemorate the recent spin-off Ai Tenchi Muyou! and the new Tenchi Muyou! Ryououki series.

Two cast members from the original series, Masami Kikuchi and Ai Orikasa, will be featured as guests for the Ryououki segment of the event alongside Haruhi Nanao, who starred in Ai Tenchi Muyou!

Official site: http://www.tenchimuyo4th.com/

Source: Hachima Kikou

Tenchi Muyou! Ryououki 4th Season on MAL