The Seto Inland Sea region in western Japan has been dubbed the “jewel of the world” for its scenic beauty, but its remarkable colors are not limited to the deep blue waters and green forests that cover its many islands. This episode explores the palette of colors, both manmade and natural, that make this region so unique, including the prized silvery sheen of sardines carefully caught and quickly processed to preserve their freshness; the pure white island that is a major salt depository; the red, green, and white lights illuminating an industrial complex that operates around the clock, as fiery bursts from flare stacks scorch the night sky; and a deep red soy sauce made by combining crystal-clear water from the forests with a traditional brewing method involving natural bacteria and wooden barrels. Unlock the secrets of the colors created by nature and the people living near the Seto Inland Sea.