The ONI Denim 270 “Ishikawadai” is a striking example of traditional Japanese craftsmanship applied to a modern, clean straight silhouette. Combining historic production methods with contemporary proportions, this model offers a unique take on heritage denim.

At the core of the fabric is the legendary Ishikawadai spinning machine, a rare piece of equipment dating back to 1953. Operating at a much slower speed than modern machines, it places minimal stress on the cotton fibers, resulting in yarns with a natural, hand-spun character and subtle irregularities. This gives the denim a depth and softness that is difficult to replicate with modern production.

The fabric is made using 6-count yarns spun on the Ishikawadai and woven on vintage shuttle looms from the 1950s, creating a 15oz selvedge denim with a refined yet organic texture. It offers a more understated slub compared to ONI’s heavier fabrics, while still delivering rich character and evolution over time.

Dyed using ONI’s secret indigo recipe, the warp displays a distinctive greencast indigo tone that fades beautifully with wear, developing nuanced highs and lows that highlight the unique structure of the yarn.

The 270 “Neat Straight” fit is ONI’s take on a perfectly balanced straight silhouette. Designed with a medium to mid-high rise and a clean, regular top block, it offers comfort without excess volume. The leg remains straight overall but features a subtle taper from the knee down, resulting in a sharp, streamlined profile that works effortlessly across styles—neither too wide nor too slim.

Fit Notes: This model fits true to size for ONI, meaning the tagged size closely matches the actual waist measurement. Compared to most global American brands, sizing is similar or slightly smaller, so you may take the same size or one size up. As always, we strongly recommend checking our size chart to find your perfect size. The denim is unsanforized but has been one-washed, so no further shrinkage is expected. With regular wear, the waistband will stretch approximately 1 inch, allowing the fit to settle comfortably over time. That said, we don’t recommend sizing down, as starting too tight may cause discomfort and alter the intended fit of the garment. 

Visit our LOOKBOOK and discover a great selection of heritage street-style outfits

• 15oz unsanforized Japanese selvedge denim, rope-dyed in indigo. One-wash finish, so no shrinkage is expected
• 100% cotton
• Yarn spun on vintage Ishikawadai ring-spinning machine
• High rise
• Regular straight fit
• Heavy-duty bar tacks
• Warp: indigo / Weft: beige
• Subtle uneven texture
• Woven on vintage shuttle looms using a low-tension weave
• Selvedge ID: pink
• ONI custom copper doughnut buttons and hardware
• Hidden rivets on back pockets
• Peek-a-boo selvedge coin pocket
• Durable cotton-lined front pockets
• Raised belt loops
• Vegetable-tanned horsehide leather patch
• Limited production
• Made in Japan

Spain

FREE SHIPPING on orders over 100 EUR .

6 EUR shipping cost on orders under the value mentioned above.

European Union & The UK

FREE SHIPPING on orders over 150 EUR \\.

14 EUR shipping cost on orders under the value mentioned above.

Rest of the World

FREE SHIPPING on orders over 250 EUR .

25 EUR shipping cost on orders under the value mentioned above.

If for some reason you are not happy with your purchase you can return it to us within 14 days for a size exchange or refund.

For more info please visit our returns & exchange page.

Please note that items in the SALE category are considered FINAL SALE, with no returns or exchanges accepted.