Mushishi, Natsume Yuujinchou Recommendations
Both deal with the the 'supernatural', which most people can't see. Also, both develop in an episodic format, although Natsume Yuujinchou has more recurring characters than Mushishi does. The two main characters' personalities are rather different, however they're similar in that they don't hate the youkai or the mushi; They simply want to coexist with them. Both are rather philosophical stories, dabbing in the topics of life and death, and both are told with a similar slow-paced narrative, although Natsume Yuujinchou has its quick action-filled moments.
Drawing on a variety of mystical themes, both series adapts a serene and powerful depiction of fantasy. Both series' main characters has the ability to see what others cannot and helps others who gets involved with such supernatural beings. Mushishi follows more of a journeyman style of direction in its story while Natsume Yuujinchou has more of a slice of life mood. But make no mistake, both series are honest with their premise and its intention to craft unique tales to tell.
This manga concerns creatures the mangaka made up which are similar to ayakashi, called mushi. The main character is an expert on mushi and travels the country, helping people who are being troubled by them. This manga has a similar pacing and situation to Natsume Yuujincho.
I'm honestly pretty surprised more people haven't recommended these two series for one another. These two series have a very similar feel to one another. Both manga center around the stories that arise from dealing with supernatural beings, with Natsume Yuujincho being Yokai and Mushishi being about Mushi. They both have mostly episodic chapters as well. I would say though that Natsume Yuujinchou is the more lighthearted out of the two, so there's that.
If you are a fan of either of these series, you should check out the other.