Blue refabric / GL3 Selvedge Denim Type 1 Jacket

Blue refabric
Built around a commitment to high-quality Japanese fabrics and dependable craftsmanship.
For many years, the project was produced as a ROCOCO-exclusive line with Japan Blue Jeans, before being relaunched in 2026 under the name "Blue refabric."

Production is centered around partner factories of JAPAN BLUE Co.,Ltd. The name combines "Blue," representing Japanese denim, with "Refabric," a coined term blending Republic and Fabric. Under the image of a "Blue Republic," the brand respects Japan's proud textile culture while creating clothing that brings out the individuality of the wearer. 

Centered mainly on premium denim from Okayama Prefecture, each piece is carefully made at trusted factories in Japan. The brand pursues minimal yet distinctive design that highlights the natural texture and character of the fabric.

From Japan to the world. Blue refabric presents a new standard inspired by Japan's rich textile heritage.









Its Irregularity Is Exactly What Makes This Denim Special
The warp uses substantial Zimbabwe cotton yarn, while the weft is made from a yarn spun from a proprietary blend of several American cottons.

Slow weaving on the GL3 creates irregular texture across the surface, while the uneven character of the weft becomes even more apparent when viewed from the reverse side. When the hems are rolled up, the rugged character of the fabric becomes a subtle visual accent.



The fabric is also finished with as little post-processing as possible, avoiding treatments such as singeing, sanforizing, and anti-twist processing that would normally make the cloth more uniform. Woven at approximately 14.7oz, the fabric is made into the finished garment and then given a one-wash treatment, allowing it to shrink and develop a dense, substantial feel equivalent to roughly 15oz.

Because the fabric intentionally retains its natural irregularities from the start, the raised areas gradually fade with wear, creating a unique character for each wearer. Rather than being complete when new, this is denim designed to evolve with wear and become truly your own.







The design is based on the 1st Type, widely considered the original denim jacket design.

A single flap chest pocket is placed on one side of the front, while vertical pleats run through the center. By keeping the overall design intentionally simple, the irregular texture of the fabric and the stitching details stand out beautifully.

Orange-toned stitching adds a striking accent against the deep indigo. Without distracting from the rugged character of the fabric, it adds subtle definition to the workwear-inspired design.



Open the front placket and the selvedge edge becomes visible on the inside. Normally hidden from view, this subtle detail reveals itself when you put on or take off the jacket, offering a quiet reminder of the vintage shuttle loom used to weave the fabric.



A "COLLECT DENIM HEADS / Japan Blue Co., Ltd." label is placed inside.
It indicates that the jacket was produced at a partner factory of Japan Blue Co., Ltd.



The back features a T-back construction, with the fabric joined along a center seam. In vintage garments, this detail was mainly found on larger sizes due to fabric width limitations, but this model incorporates it across all sizes.

This means you can enjoy the distinctive back design in every size. While the front retains the clean, simple look of a classic 1st Type jacket, the center seam adds character from behind, making it a detail vintage enthusiasts will appreciate.



The cuffs feature button closures, maintaining the authentic construction of a classic denim jacket. A cinch back at the waist allows you to adjust the fit for a more personalized silhouette.





The silhouette is based on the clean, shorter length characteristic of the 1st Type, with enough room to avoid clinging too closely to the body.

While retaining the classic atmosphere of a denim jacket, the proportions are balanced to pair easily not only with slim trousers but also with wide-leg pants.