The ONI “Kase” Coverall brings the brand’s most expressive natural indigo denim into a timeless workwear silhouette, reinterpreting late 19th-century French chore coats through ONI’s extreme Japanese craftsmanship. Built from the same 16oz Kase denim as the jeans, this piece combines historical inspiration with one of the most character-rich fabrics ONI has ever produced.

The fabric draws inspiration from traditional kase-zome (hank dyeing), a method once widely used in Okayama where yarns were hand-dyed prior to weaving. While classic kase-dyed yarns absorb dye to the core—resulting in minimal fading—Oishi-san reengineers the concept by pairing the visual depth of kase-style dyeing with natural indigo rope dyeing, achieving a rare core-white structure. This allows the garment to develop real, high-contrast fades over time while retaining the layered, uneven color depth that defines kase aesthetics.

Woven at ultra-low tension on vintage shuttle looms, the 16oz selvedge denim is wildly irregular, packed with slub, nep, and visible rain-like streaking. The surface constantly shifts between deep indigo, inky navy, and electric blue highlights, creating a fabric that feels alive and continues to evolve dramatically with wear. As the coverall breaks in, the vertical fading and texture become even more pronounced, giving the piece unmistakable ONI character.

The design follows classic chore coat principles: functional, balanced, and built for daily wear. It features dual chest pockets—one external and one internal—for secure storage, along with large patch hand pockets at the waist. Construction is finished with custom ONI copper donut buttons, durable stitching, and signature ONI labeling. A one-wash treatment ensures dimensional stability, so no further shrinkage is expected while still allowing the fabric to age naturally.

Fit Notes: Despite being a Japanese-made jacket, like most ONI garments, the sizing of this jacket leans more Western than traditionally Japanese. If you typically wear a size M in American jackets, you’ll likely find a good fit with a size 40 (M) in this model. However, as always, we recommend checking our size chart to ensure the best fit. The jacket has been once-washed, so no further shrinkage is expected.

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

• 16oz Japanese unsanforized selvedge denim. The fabric is unsanforized, but the coverall has been one-washed, so no further shrinkage will occur.
• 100% cotton
• High rise
• Inspired by late 19th-century French chore coats
• Dual chest pockets (one exterior, one interior)
• Large patch hand pockets
• Custom ONI copper donut buttons
• ONI woven labeling
• Warp: dark indigo / Weft: white
• Ultra–low tension woven for extreme slub and texture
• Deep, multi-dimensional indigo tones with strong “rain” slub effect
• Iconic ONI Kabuki selvedge (orange, green, black)
• Super limited quantities
• Made in Japan

Spain

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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.