Japan Blue Indigo Dyed Denim Bomber Jacket

Size Guide

Japan Blue goes WAR MODE!

The bomber jacket has been a fashion staple since it was first introduced as military wear in WWII. Japan Blue has updated this iconic menswear piece to its made-in-Japan standard!

Japan Blue has constructed the shell of this jacket with their specially developed 13.5oz denim. Slowly woven on vintage denim machines and indigo thread-dyed, this jacket will get better with time, as it fades to high-contrast indigo look! For the lining, Japan Blue has used a silky-smooth, cotton/nylon camo pattern fabric, slowly woven on vintage jacquard machines but not just printed.

Construction-wise, this jacket features cotton ribbing fabric on the collar and sleeve cuffs, and jacquard-lined hand-warmer pockets for added comfort and wind protection!

Fitting-wise, Japan Blue has updated the vintage boxy fit to make it slimmer and longer in the vertical length to make for a more modern, flattering fit!

If you are looking for a classic bomber jacket, constructed with premium Japanese denim fabric and an affordable price, then JB could be a great choice!

  • Shell: Japanese 100% cotton 13.5oz grand indigo thread-dyed denim
  • Lining: Japanese 52% cotton & 48% nylon mixed silky smooth jacquard knitting fabric
  • Ribbed collar, cuffs & hem
  • Twin front side pockets
  • Black coated two-way brass zips
  • Slim fit
  • Once washed (minimal shrinkage)
  • Made In Japan

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How We Measure

Pants and Shorts


With the major buttoned up (i.e. the top button) open the jeans and lay them flat, like shown. Measure from the front where the major button closes to the back belt loop. Double this measurement to find the waist measurement.

The way we measure the waist is different from the 'Side to Side' technique. If you are used to the 'side to side' technique you can roughly roughly downsize by 1 inch.

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

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.