"The Twelve Kingdoms" is a Japanese fantasy series created by Fuyumi Ono. It is set in a parallel world consisting of twelve kingdoms, each ruled by a monarch. The story follows Yoko Nakajima, a high school student who is transported to this world, where she discovers her true identity and the responsibilities of leadership. The series explores themes of self-discovery, governance, and the complexities of power. Each kingdom has its own unique culture, creatures, and challenges, contributing to a rich narrative that delves into the lives of various characters, including gods, youkai, and humans.