The Key to the Kingdom

The Key to the Kingdom (王国の鍵) is a Japanese manga series written and illustrated by Kyoko Shitou. The manga was serialised in Kadokawa Shoten's Asuka Fantasy DX. The manga is licensed and published in North America by CMX and in Taiwan by Kadokawa Shoten's subsidiary Kadokawa Media.

Manga
Kadokawa Shoten released the manga's 6 bound volumes between March 29, 2003 and December 25, 2004. CMX released the manga's 6 tankōbon volumes between September 19, 2007 and December 30, 2008.

Reception
Casey Brienza from Anime News Network commends the manga for its "exquisite artwork, entertaining storyline and characters". A later review by Casey Brienza criticises the manga for ending the series "a bit rushed, so the series does not end as strongly as it should have" but also commends the manga for "brilliant high fantasy storyline and breathtaking art".

In 2009, The Key to the Kingdom was listed as Great Graphic Novels for Teens by the Young Adult Library Services Association.