The ONI Denim Ishikawadai Old Design Jacket is a highly distinctive piece that draws inspiration from early American workwear and classic denim garments. Combining elements from late 19th-century work jackets, Type II designs, and vintage coverall construction, it offers a rare and character-rich interpretation of heritage outerwear.

Crafted from ONI’s exceptional 15oz Ishikawadai selvedge denim, the fabric is produced using a vintage 1953 Ishikawadai spinning machine, which operates at a significantly slower speed than modern machinery. This process preserves the integrity of the cotton fibers, resulting in yarns with a naturally irregular, hand-spun appearance and subtle texture throughout.

Woven on 1950s shuttle looms, the denim delivers a balanced combination of structure, softness, and long-term durability. The warp is dyed using ONI’s secret indigo formula, producing a rich greencast indigo tone that evolves beautifully over time, revealing depth and character with wear.

Design-wise, this model stands apart from traditional denim jackets. It combines pleated front details typical of Type II jackets with the functional character of coveralls, including distinctive waist pockets inspired by early workwear garments. The cuffs are also finished in a coverall style, further reinforcing its utilitarian roots.

The jacket features a unique T-shaped pattern construction through the body and sleeves, along with triangular underarm gussets, improving mobility and comfort—an often overlooked but highly functional detail rooted in traditional garment engineering.

Fit Notes: This model runs small compared to other Oni jackets, so we recommend sizing up one from your usual size. Compared to most global American brands, this typically means taking one size up for the intended fit. The denim is unsanforized but has been one-washed, so no shrinkage is expected. True to vintage specifications, this jacket features a shorter length typical of original designs. It pairs perfectly with high-rise trousers for a balanced, classic silhouette. As always, we strongly recommend checking our size chart and comparing it with your best-fitting jacket to find the perfect size.