Nabari no Ou (隠の王Nabari no Ō, lit. Ruler of Nabari) is a Japanese manga series written and illustrated by Yuhki Kamatani . The series premiered in Japan in Monthly GFantasy in 2004 and the final chapter was released on August 18, 2010. Square Enix is also publishing the individual chapters in collected volumes with eleven volumes released as of June 2009. The series has been licensed for an English language release in North America by Yen Press. The first volume was released in May 2009. Nabari no Ou was a finalist in the 2005 Japan Media Arts Festival and was a recommended title.