Please answer the following question: The Key to the Kingdom - The Key to the Kingdom ( Okoku no Kagi) 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. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Written Work