Saraiya Goyou, Mushishi Zoku Shou Recommendations
Relaxing peaceful feel, slow running, calm pace, disposition that is supported by excellent music opening and ending themes and a unique animation style. Both stories possess a mysterious feel to it and how it all comes together slowly but surely.
Both present very tranquil moods and lovely naturalist imagery. They're both paced rather slowly, each one utilizing its atmosphere to tell its story. Bonus: both feature a cool, sly guy character with white hair and piercing green eyes.