"Terranigma" was released alongside several pieces of merchandise in Japan, including an official guide book, a world atlas, a novel by Saori Kumi, a novelization by Norio Nakai titled "Logout Bunko Tenchi Sōzō", a gamebook featuring artwork by character designer Kamui Fujiwara, and the two volume manga "Gangan Fantasy Comics: Tenchi Sōzō" by Mamiko Yasaka.