is a Japanese manga artist from Kumamoto, Japan. She is mainly known for her work, .
Kusanagi's debut series, Yoiko no Kokoroe, was published in 2003 and serialized in Hakusensha's shà Âjo magazine, Hana to Yume. In 2009, Kusanagi's longest-running series, Yona of the Dawn began serialization in Hana to Yume. Yona of the Dawn has remained as her most popular series and was adapted into an anime in 2014 by Studio Pierrot, receiving a 24-episode series, an OVA episode in 2015, and an adaption of the Zeno Arc in 2016.
In 2002, Kusanagi's work Goshin Kyoudai ga Yuku!? (御ç¥Âå Âå¼ÂãÂÂãÂÂãÂÂ!?) came second in the 27th Hakusensha Athena New Face Award. The following year, she won the 28th Hakusensha Athena New Face Award for Outstanding Debut with Yoiko no Kokoroe. Yona of the Dawn has been awarded with Hakusensha's Denshi Shoseki Taishà  (E-Book Award) which is given to the best-selling digital manga in 2015 and 2021.