Overview: On this edition of Journeys in Japan , we visit the Iya Valley, in the center of Shikoku.On this edition of journey in japan , we visit the Iya Valley, in the center of Shikoku. Until about 40 years ago, it was cut off from the rest of the island, and people living there had little interaction with other communities. This allowed the traditional customs and lifestyle to remain unchanged for centuries. Our reporter, Adeyto, takes a local train into the mountains of Shikoku, following the course of the Yoshino River, the longest river on the island. Then she has to take a bus along a mountain road that's so only wide enough for one vehicles at a time. (Excerpt)