J401(D01) 14.8oz US Cotton Selvedge Jeans (Aging Wash)

J401 (D01) / Classic Straight

Enjoy the deep, rewarding aging of authentic hard denim with a vintage-inspired, real-used look.
Designed with a classic straight silhouette, J401 (D01) offers a comfortable yet refined profile that’s easy to wear every day.
Its rich contrast and pronounced whiskers develop beautifully over time, creating character unique to the wearer.

Design / Silhouette
CLASSIC STRAIGHT
A mid-rise classic straight with a slightly wider leg opening and just a hint of taper toward the hem.
This relaxed silhouette stays roomy without feeling bulky, delivering a timeless look with effortless style.

Fabric
14.8oz US cotton selvedge denim (Aging Wash)
A signature JAPAN BLUE JEANS fabric used since the brand’s early days.
Firmly spun yarns and a dense weave give the denim its durability and bold, vintage-inspired texture.
Expert aging wash processing creates deep contrast, well-defined whiskers, and a rich, authentic fade—
true denim made to be worn hard and broken in.
Dry to the touch with an authentic heritage feel and plenty of character right out of the box.
Ideal for long-term wear and fading.
Learn about Selvedge Denim

Details
Fabric: Hard / No stretch
Fit: Wide / Mid-rise / Full length
Front: Zipper fly
Selvedge: Red
Back pockets: No decorative stitching
Leather patch: Natural cowhide
Inseam: JBJ signature blue stitch
Hem: Chain-stitched finish
Treatment: Aging wash
Material: 100% cotton
Origin: Made in Japan
Style code: JBAG0401

Crafted in Kojima, Okayama—Japan’s denim capital.
All production processes, from fabric development to finishing, are handled entirely in Japan.

The curved waistband construction follows the natural shape of the body,
offering improved comfort and a more secure fit at the waist compared to traditional straight waistbands commonly found in men’s jeans.

Model
179cm / 73kg — wearing size 32