Nanahiko Takagi is a Japanese manga artist and writer, recognized as the original creator behind the historical action series Angolmois: Record of Mongol Invasion. Takagi is credited as the sole author of the Angolmois manga, handling both the story and the illustrations. This work is the primary and most notable title associated with the creator.

The Angolmois manga began serialization on February 26, 2013, in Kadokawa Shoten's Samurai Ace magazine. After Samurai Ace ceased publication in December 2013, the series moved to Kadokawa's ComicWalker website and app, where it continued from July 11, 2014, until its conclusion on August 22, 2018. The complete series was compiled into ten collected volumes, released between February 2015 and August 2018 under Kadokawa's Comics Ace imprint. A sequel manga, Angolmois: Genbai Senki Hakata, began serialization on ComicWalker on January 2, 2019.

The success of the original manga led to an anime television adaptation. The series, also titled Angolmois: Record of Mongol Invasion, was produced by the animation studio Naz and aired in Japan from July 11 to September 26, 2018, for a total of twelve episodes. In this adaptation, Nanahiko Takagi is officially credited as the original creator.

Beyond the manga and anime, the franchise also includes a two-volume novelization. Titled Angolmois: Ihon Genkō Gassen-ki, the novel was written by Akaganedai and features illustrations by Nanahiko Takagi.

Based on the available information, Nanahiko Takagi's professional identity is firmly established as a manga author, but no verified details about personal background, such as date of birth or place of origin, are documented. Similarly, there is no available information on other independent original works, recurring thematic signatures across a broader bibliography, or the creator's significance within the wider anime and manga industry beyond the scope of the Angolmois series.