This should be excellent news for Mushishi fans. Following the Sunday airing of a TV special for the series called Mushishi Tokubetsu-hen: Hihamukage, an announcement was made that a second season has been green-lit for production called Mushishi: The Next Chapter and will air in April 2014.
Most of the production staff from Artland for the original 2005 TV anime will return to be involved in making the series and Ginko's original seiyuu, Yuto Nakano, will be reprising his role in this second TV season.
For those not in the know of the series, Mushishi was based on a 10-volume manga series made by Yuki Urushibara for the Afternoon seinen magazine from 1999 to 2008. The series focused around the exploits of Ginko, a young man who wanders the land to aid others affected by supernatural beings called mushi. The first season TV anime and a live-action movie directed by Katsuhiro Otomo are both currently licensed by Funimation and available in both streaming (anime only) and physical media formats, while all volumes of the manga series were released by Del Ray Manga.