On this edition of Journeys 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, 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. Adeyto visits a community built on the steep mountainside, to find out about the traditional lifestyle in this remote settlement. The buckwheat harvest is just over and she gets to try a traditional dish made from buckwheat grain. Finally, Adeyto hikes to the top of Mt. Tsurugi, the second highest peak in Shikoku, located at the far end of the Iya Valley.