Hyakka Ryōran: Samurai Girls (Japanese: 百花繚乱 SAMURAI GIRLS, Hepburn: Hyakka Ryōran Samurai Gāruzu, shortened to Samurai Girls) is a Japanese light novel series written by Akira Suzuki with illustrations by Niθ to commemorate Hobby Japan's 40th anniversary. The first volume was released by Hobby Japan on February 28, 2009, with 17 volumes currently available in Japan under their HJ Bunko imprint. There are currently three different manga adaptations based on the Hyakka Ryoran universe published. An online anthology comic was serialized on Hobby Japan's media website Hobby Channel from June 1, 2010, and sold two volumes as of June 2011; a manga adaptation illustrated by Junichi Iwasaki began serialization in the November 2010 issue of Monthly Comic Alive; and another manga adaptation by Tatara Yano began serialization in Hobby Japan's online manga magazine Comic Dangan on December 23, 2011. A spinoff manga called Hyakka Ryōran: Sengoku Maidens, illustrated by Yuri Shinano, was serialized in the March 2009 issue of Dengeki Daioh and ended in the March 2011 issue, and released three volumes as of March 2012.

A 12-episode anime adaptation produced by Arms aired on Chiba TV and other networks from October 2010 to December 2010. A second anime season aired from April to June 2013. At Anime Expo 2010, Hobby Japan announced that they are planning to release the light novels in North America in the near future.The series is loosely based on the Sengoku period or early Edo period of Japan, despite being set in the present day.