Honjima is one of the Shiwaku group of islands in the Seto Inland Sea, between Japan's mainland Honshu and Shikoku. On this edition of "Journeys in Japan", radio DJ Chris Glenn explores the history and culture of Honjima and discovers handsome townscapes that have changed little for more than a century.

Himeji Castle, in Hyogo Prefecture, just reopened after an extensive renovation. Its dazzling white appearance has been fully restored. On Journeys in Japan, radio DJ Chris Glenn, who has visited more than 400 castles and ruins, explores the secrets hidden within the imposing fortress. Later he tastes thin, pure white somen noodles and encounters traditional handicrafts made of supple white leather. He meets with craftsmen who take great pride in producing their white leather material and wares.

On this edition of Journeys in Japan, we travel to Oya, an old stone town in Utsunomiya City, Tochigi Prefecture. Australian radio DJ Chris Glenn visits an ancient temple carved into a cave and featuring stone Buddhist reliefs. He goes underground into a cavernous former quarry. And in another ruin, he takes an adventure tour of a mystical underground lake. He stops by a stone artisan's workshop as well as a jazz cafe where the owner has created speakers with Oya stone. On this journey, Chris feels the deep connection between the local people and their beautiful stone.

Since ancient times, people in Japan have felt a profound veneration for the bedrock of their land. Quarried and mined, this rock has been skillfully used to create the stone walls of castles and buildings. It is also the base material for statues carved as an expression of religious faith. And in some places, there is a strong belief in the spiritual power of those forms in stone. On this episode of Journeys in Japan, we travel to 4 sites — in Okayama, Tochigi, Oita and Aomori Prefectures — to discover this deep, mysterious relationship.