Amami Oshima Islands in Kagoshima Prefecture receives one of the largest amounts of rain in Japan. Its rainy season, which runs from May through June, in particular, provides enough water to sustain its lush nature, including rare species of plants and animals, all year round. In this episode of Journeys in Japan, outdoor writer from Sweden Janni Olsson enjoys Amami's rainy season as she engages in activities not available elsewhere and learns about the island's culture.

Deep in the mountains of Shikoku lies Iya, which is home to a few small settlements. The steep, narrow and misty valley is the stuff of lore. In the 12th century it was a haven for fugitive Heike clan warriors who easily slipped away in the rugged terrain. Over the years, the community has seen its population shrink and age. But a decade ago, Iya became a popular destination for overseas visitors. We visit Iya to find out why and search for hints for regional revitalization.