Japan Blue Jeans J501 Loose Fit 14.8oz

The J501 Loose Fit 14.8oz from Japan Blue Jeans belongs to the CIRCLE line, a collection designed to offer a more ergonomic approach to Japanese denim, thanks in particular to a curved waistband construction that provides improved support and enhanced everyday comfort. Crafted from a robust 14.8oz Japanese selvedge denim, this model combines heritage authenticity, generous volume, and the high manufacturing standards of Kojima.

Features

• 100% cotton / 14.8oz
• Japanese selvedge denim made from American Texas cotton
• Sanforized / one wash
• Red selvedge ID
• Loose Fit
• Mid-to-high curved rise
• Ergonomic curved waistband
• Wide and comfortable thigh
• Wide straight leg
• Natural leather patch
• YKK zip fly
• Copper button and rivets
• Chain-stitched hems
• Inner leg seam with signature blue stitching
• Made in Japan (Kojima, Okayama)

Description

With the J501 Loose Fit, Japan Blue Jeans offers the most relaxed interpretation of its CIRCLE line, combining modern technical construction with traditional Japanese selvedge denim woven from American Texas cotton. Known for its strong, slightly irregular fibre, this cotton produces a denim that is both durable and full of character, capable of developing rich and contrasted fades over time.

The 14.8oz fabric maintains structure despite its generous volume. It offers enough stability to preserve a defined silhouette while remaining comfortable from the first wear thanks to its one wash treatment, which stabilizes the fabric and slightly softens its hand without removing its raw character.

A defining feature of the CIRCLE line is its curved waistband, designed to naturally follow the shape of the hips. This construction helps eliminate gaps at the back of the waist and significantly improves comfort when sitting, while also providing better overall stability. It is a core element of Japan Blue’s ergonomic approach in this collection.

The model features a Loose Fit, defined by a relaxed and roomy silhouette throughout the leg. It offers a generous thigh, a wide straight leg, and a consistently relaxed profile from top to hem, creating a contemporary and easygoing look. Despite its volume, the construction remains balanced thanks to a structured rise, avoiding excessive bulk while maintaining excellent comfort and mobility.

Finishing details reflect the attention to craftsmanship: red selvedge ID, copper rivets and button, YKK zip fly, reinforced stitching, and signature blue inner leg stitching. Each element is designed to balance durability, functionality, and understated aesthetics.

Made in Kojima, Japan, this model perfectly embodies Japan Blue Jeans’ philosophy: offering authentic, durable, and modern denim designed for everyday wear while developing strong character over time.

Fit & Sizing

• Loose Fit
• Mid-to-high curved rise
• Wide and comfortable thigh
• Wide straight leg
• Relaxed and contemporary silhouette
• Enhanced comfort thanks to the curved waistband
• We recommend taking your usual size for a natural fit

Why We Selected It

We selected the J501 Loose Fit for its modern interpretation of relaxed denim, combining maximum comfort with precise Japanese craftsmanship. Its Japanese selvedge denim made from Texas cotton offers a lively, durable texture, while the ergonomic CIRCLE construction significantly improves everyday wearability. Its controlled loose silhouette makes it a strong yet highly wearable piece for those seeking a relaxed fit without compromising quality.