Japan Blue 14.8oz WWII Denim Jacket

Size Guide

Get ready for BATTLE MODE with Japan Blue's WWII Type 1 denim jacket!

Japan Blue knocks out of the park with their latest take on the iconic WWII version denim jacket! The sturdy 14.8oz denim fabric has been slowly woven on vintage machines using 100% Texas cotton which has a rough, slightly irregular texture. Thanks to the grand-indigo yarn-dyeing method, this jacket will only look better with time, as it ages to a beautiful high-contrasted look!

Construction-wise, this jacket features classic WWI details such as a single open chest pocket, doughnut buttons and a T-back design, highly sought after by vintage collectors! The cinch back allows you to get the perfect fit!

If you are looking for an amazing WWII-style denim jacket with great value, Japan Blue could be a perfect choice!

  • 100% Cotton
  • Japanese 14.8oz red selvage ID denim
  • Grand indigo dyed
  • Left chest pocket
  • Brass buttons
  • Japanese vegetable-tanned cowhide leather patch
  • Regular fit
  • Once washed (Minimal shrinkage)
  • Made In Japan

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How We Measure

Pants and Shorts


With the major buttoned up open the jeans and lay them flat like shown. Measure from the front where the major button closes to the back belt loop. Then double this measurement to achieve the waist measurement.

The way we measure is different from 'Side to Side', If you are not used to our method you should downsize by 1 inch.

For example, side to side measurement for The Flat Head 3002 waist is 28inch and using our method 29.25 inch.

Front Rise:

With the jeans lying flat measure from the crotch bar tack to the top of the waistband. 

Back Rise:

Spread out the crotch so the bar tack is visible, then measure from the crotch to the top of the waistband.


One inch down from the crotch measure flat across to the other side.


Flatten the leg and measure along the inseam from the crotch to the leg hem. 

Leg Openning:

Measure straight across the hem from side to side.



Lay flat then measure from the shoulder's edge to the other shoulder's edge.


Lay shirt flat and measure from pit to pit.

Sleeve length:

With the sleeve flat measure from the shoulder to the cuff.

Arm hole openning:

Measure from the shoulder down to the pitt.

Vertical length:

With the shirt facing down, Measure from below the collar to the bottom hem.