Skip to content
RISE 12¾″ WAIST 32″ THIGH 13¾″ KNEE 10″ OPENING 8½″
J501, size 31

Technical flat drawn to scale from the size chart.

Japan Blue Jeans

J501

High rise and a loose, straight leg: Japan Blue's roomiest classic cut.

Your size31

For a 32″ waist (our default: enter yours). Size 31’s waistband measures 32″, right at your waist. Selvedge gives about an inch with wear, so a waistband that starts at your waist ends up comfortable, not loose.

Sized for a 32″ waist in
Maker’s fit name
Loose
Fabric
14.8oz US cotton selvedge
Weight
14.8 oz
Maker
Kojima, Okayama
Shrinkage & finish
Sanforized, one-washed Hemming and cuffing guide
Where to buy

Order size 31 for a 32″ waist, and check the seller’s own chart before you buy. Menjitsu may earn a commission when you buy through these links. It never changes your price or which jeans we chart.

Measured profile

at size 31
Rise
high
Thigh
roomy
Taper
strong
Opening
medium
Other sizes

J501 size chart

Units
in cm
TAG 29 30 31 32 33 34 36 38
Waist 30 31 32 33 34 35 36 38
Front rise 12 12½ 12¾ 12¾ 13¼ 13¾ 13¾ 14¼
Back rise 16¾ 17 17 17¼ 17¾ 18 18¼ 19½
Thigh 13¼ 13¼ 13¾ 14 14¼ 14½ 15 15¾
Knee 9½ 9½ 10 10¼ 10¼ 10½ 10¾ 11¼
Leg opening 8 8¼ 8½ 8½ 8¾ 9¼ 9½ 9¾
Inseam 32 32 32 32 32 32 32 32

Inches; thigh, knee and opening are measured flat. Transcribed from Rivet & Hide (published in inches). Retailers measure differently; confirm with the seller before you buy.

Compare with another model

Japan Blue Jeans J501 広Wide · 31 Rise highThigh roomyTaper strongOpening medium
Graph Zero GZ-15HRJ 広Wide · 33 Rise highThigh roomyTaper gentleOpening wide

The Graph Zero GZ-15HRJ is longer in the leg (+6¼″), wider at the opening (+1″), fuller at the knee (+⅝″) and slimmer in the thigh (−⅜″). Both are Wide cuts.

How the GZ-15HRJ would fit

  • Closer through the thigh, so expect a snug feel until it gives with wear.
  • Falls straighter below the knee, more of a column.
  • A wider opening that sits easily over boots and stacks less.
  • Longer in the leg: more to cuff or stack.
J501size 31GZ-15HRJsize 33Diff.
Waist 32 32¼ +¼″
Front rise 12¾ 12¾ same
Back rise 17 16⅜ −⅝″
Thigh 13¾ 13⅜ −⅜″
Knee 10 10⅝ +⅝″
Leg opening 8½ 9½ +1″
Inseam 32 38¼ +6¼″

Diff. is the GZ-15HRJ minus the J501. Clear

Compare with jeans you own

Enter at least two measurements from jeans you already own and we’ll draw them over size 31.

Community

Talk about the J501

Ask about this jean →

No discussions yet. Own a pair, or thinking about one? Start the conversation.

How members wear it

No one has logged photos of the J501 yet. Own a pair? Add it to your collection with your size, how it fits and how it's fading. It helps the next person choose, and earns you points.

Win your dream pair of selvedge

Join the Menjitsu community free and you’re entered into every giveaway we run, with bonus entries for helping others.

or use your email