Locating at the southern tip of Okayama prefecture right by Seto Inland Sea, Kojima is a the last stop of JR train south before you connect to Shikoku from Okayama. As a seaside land, the soil was too salty to grow rice. Hence all farmers started to grow cotton. During the Edo Period a few hundred years ago, Kojima flourished to become a textile town producing Sanada-himo (the cotton strap of swords), then Tabi (the traditional split toes socks in Japan), and later uniforms for students from all over Japan until synthetic fibre became popular in 20th centuries.
Inspired by the casual jeans look of the America, one of the textile company (now Big John) produced the first Japanese jeans in Kojima in 1965. It was a big hit in Japan. Soon after, more jeans factories joined the production of jeans. Kojima becomes the jeans town in Japan and famous for producing high quality denim products.