Mushishi(1999)

Some live in the deep darkness behind your eyelids. Some eat silence. Some thoughtlessly kill. Some simply drive men mad. They are known as mushi—creatures that came into being shortly after life emerged from the primordial ooze. They still exist parallel to our own lives and can only be seen by a select few. As a mushishi, Ginko is one of the few who are aware of their existence, and this young man with a sardonic smile roams from place to place with the knowledge and skill to aid those unwittingly affected by mushi.

(Source: Kodansha USA)

Note: Won the Excellence Prize for Manga at the 7th Japan Media Arts Festival in 2003 and the Kodansha Manga Award for General Manga in 2006.