Inside the Workshop: A Japanese Denim Weaver

In Kojima, Okayama Prefecture, vintage Toyoda shuttle looms from the 1950s weave selvedge denim at roughly fifteen metres per hour, a fraction of modern projectile looms. The resulting fabric is denser, more irregular, and more characterful, making Japan the world's most revered source of premium denim.

Japan's denim obsession began in the 1960s with American military surplus. By the 1980s, Japanese manufacturers were surpassing American denim, seeking out original shuttle looms that U.S. mills had discarded and mastering dyeing techniques American producers had abandoned for efficiency.

The indigo dyeing process involves repeated immersion of yarn in indigo vats. Each dip adds a layer of colour to the yarn's surface, leaving the core white. This rope-dyeing method creates the characteristic fading patterns enthusiasts prize: indigo wearing away to reveal white beneath in patterns unique to the wearer.

Selvedge, the self-finished edge created by the shuttle's passage, prevents fraying and indicates slower production. The coloured threads woven into the selvedge edge, visible when jeans are cuffed, have become signatures of individual mills and brands.

The weaving requires constant attention. Shuttle looms are temperamental machines that break threads and jam. A single weaver tends no more than four or five looms, compared to the dozens a modern operator oversees. This limitation is the source of the fabric's quality: slow production creates variations that give denim life.

Japanese denim culture extends to an almost philosophical approach to wear. The concept of aging raw denim without washing, allowing it to mould to the body, reflects a wabi-sabi aesthetic of finding beauty in imperfection and the passage of time.

Visit https://www.okayama-denim.com for a guide to Japanese producers. A pair of jeans woven on these vintage looms is a collaboration between machine, weaver's attention, and the body and life of the person who wears them.