Tsukasa Tanimai is a Japanese creator recognized as the original author of the light novel series Teogonia. Information about Tanimai’s background prior to this work is not documented in public sources, and their creative identity is defined solely by this series.

Tanimai began writing Teogonia as a web novel on the user-generated platform Shōsetsuka ni Narō in August 2017. The series was subsequently acquired for print publication by Shufu to Seikatsu Sha, which began releasing it as a light novel under its Pash! Books label in March 2018, with illustrations by Kōichirō Kawano. The story follows Kai, a boy in a war-torn land who begins to recall memories of a technologically advanced world, setting him on a path toward larger conflicts.

The Teogonia series has expanded into multiple media formats, all crediting Tanimai as the original creator. A manga adaptation illustrated by Shunsuke Aoyama began serialization on the Pash Up! website in 2018. The light novel and manga have seen continued publication, with multiple volumes released in Japan and licensed for English distribution by J-Novel Club.

An anime television adaptation of Teogonia was announced, with production handled by Asahi Production and a premiere scheduled for April 2025. In a statement regarding the adaptation, Tanimai expressed gratitude to the production team and readers, noting the progression of the work from text to illustrations, manga, and finally an animated format.

Tanimai’s creative output is singularly focused on the Teogonia series, with no other published works attributed to the name in available records. The trajectory of the series from web novel to light novel, manga, and anime represents a typical career path for creators who gain recognition through online platforms, leading to professional publication and multimedia expansion.