The denim is woven with a blended cotton #4.5 x #4.5 original slubby yarn.
The cotton derives from USA / Australia / Other. Most of the cotton is American and Australian, but other cottons are changed every year to keep same quality.

This is a super-heavyweight 21oz regular straight model.

There is a little room around the waist, and it has a straight leg that is gently tapered at the hem. It's not too slim or wide, it's a classic silhouette reminiscent of vintage jeans.

The denim fabric is the strongest 21oz special selvedge. It is a special denim that is not only super-thick, but also very focused on colour fading and texture. It has a special thick uneven thread count of 3.6 and is driven to the limit with an old-fashioned force loom.

The leather patch for the S510XX21oz is the basic design of the samurai patch, and the huge Musashi Kojiro indicates that it is a 21oz denim. Red Samurai woven label on pocket.

The sewing is mainly two colours - banana yellow and golden brown, and it is adjusted according to the characteristics of each part, such as count, needle, and stitch width. The back pocket is designed with the image of a seagull flapping, and the shadow warrior stitching with dark blue thread. The stitch detail becomes more prominent due to colour fading over time.

Cho-Kiwami Selvedge denim:

Woven on vintage wooden shuttle looms, only the weaving craftsmen of the highest merit and skill were able to tame the looms that created tough denim over 20oz.
Their blood, sweat and soul are symbolised by the strands of red and gold lamé which run along the selvedge line of this 21oz denim.