Yūji Iwahara is a manga artist. After graduating from art school he joined Hudson Solf as a graphic artist. He made his manga debut in 1994 in Afternoon with a story for which he won the fall Afternoon Four Seasons Award, a prize he received three more times over the next two years. He is best known in the West for his work on King of Thorn and Chi, both of which have been licensed in English. He also drew the art for Quest, a short-lived title in the Marvel comic imprint Tsunami.

His other works include the manga adaptation of the videogame Koudelka. His recent series Cat paradise, which has been serialized in Champion RED since April 2006, is licensed in English. In 2007, he contributed the original character designs to the anime television series, Darker than Black: Kuro no Keiyakusha. He's also the artist of Darker than Black: Shikkoku No Hana - the second Darker than Black manga series, which started in 2009.

Iwahara's illustration process was featured in the March 2001 issue of newtype

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