Mushishi

Mushishi is a seinen anime and manga series. The manga consists of ten volumes and the first season of the anime series cover the first five volumes. A second season has recently been announced.

The Mushishi manga won an Excellence Prize at the 2003 Japan Media Arts Festival and the 2006 Kodansha Manga Award

Plot
The creatures generally known as "Mushi" are neither plants nor animals, they differ from other forms of life such as the micro-organisms and the fungi. Instead they resemble the primeval body of life. Their existence and appearance are unknown to many and only a limited number of humans are aware of them. Ginko is a "Mushi-shi" who travels around to investigate and find out more about the "Mushi". In the process, he also lends a helping hand to people who face problems which may be related to the "Mushi".

Other Sources
Review of Mushishi at Anime Academy