It has been 20 years since the inception of Iron Heart, and to celebrate this milestone Iron Heart Japan are taking things back to where it all started, with a limited run of Haraki san’s first Iron Heart jean design, the 634 - a classic straight cut. A little-known fact is that Haraki san came up with the name Iron Heart for his new brand whilst standing in the bathroom after a few beers with friends, discussing his vision for the future.

This 20th anniversary edition features many of the same details found on our standard model but with several special features. They are, of course, constructed from our signature 21oz selvedge indigo denim, but the arcuates on the rear pockets of each pair of jeans have been individually chain stitch embroidered with gold thread, a very time-consuming process carried out by the very talented Hayakawa san. We have also switched out the cowhide back patch for a black cordovan horsehide leather version, which has been hand embossed with a custom 20th-anniversary design by Hirao san of Wedge Leathers who produce Iron Heart’s leather goods. The left front pocket bag has been two-colour screen-printed with a special anniversary design. And if this was not enough, the lot number and size has been stamped onto the patch by Haraki san himself.

Strongly limited quantity and exclusively available in Germany at Iron Heart Germany.

• Classic straight cut with medium rise
• 21oz rope dyed indigo warp, natural weft Japanese selvedge denim
• Woven with a double twisted weft yarn
• Button fly and hidden rivets
• Lined rear pockets
• Black cordovan horsehide leather patch
• Belt loops sewn into waistband
• The waist size 42" and 44" come with two extra belt loops
• Poly/cotton constructional stitching
• Chain stitch embroidered arcuates
• Selvedge side seams and fly construction
• Sanforized and one-washed - little to no shrinkage to be expected
• The waist will stretch out approximately one inch with wear
• Other dimensions will stretch proportionately to the waist
• Made in Japan 

Measurements are specific to the product displayed on this page.  The best way to determine your size is to measure a similar item that fits you well using the method shown in the "How we Measure" tab and compare with the size chart.  Note that Iron Heart items of the same size can vary slightly.  If a specific dimension (for example, arm length) is important to you, please ask us to check this by adding a note to your order.