My review of vol. 4 of Mushishi is now up at Manga Life. An excerpt:

As with previous volumes in this series, these stories are episodic, linked only by Ginko himself. On the surface, these stories appear to focus on the mushi and their strange effects on the natural world, but at their hearts, they are actually much more concerned with Ginko, the people he meets, the fleeting connections they make, and their lasting loneliness.