Technical flat drawn to scale from the size chart.
J301
Japan Blue's best-known cut: a regular top block that narrows steadily below the knee.
For a 81.3 cm waist (our default: enter yours). Size 31’s waistband measures 81 cm, 0.3 cm under your waist: snug for the first few wears, then the waistband gives and settles right at your waist.
- Maker’s fit name
- Straight (tapered leg)
- Fabric
- 14.8oz US cotton "Circle" selvedge
- Weight
- 14.8 oz
- Maker
- Kojima, Okayama
- Shrinkage & finish
- Not stated by the source. Ask the seller whether the chart is raw or washed. Hemming and cuffing guide
Order size 31 for a 81.3 cm 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
- mid
- Thigh
- regular
- Taper
- strong
- Opening
- narrow
| TAG | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 36 | 38 |
|---|---|---|---|---|---|---|---|---|---|
| Waist | 74 | 77 | 79 | 81 | 84 | 87 | 89 | 94 | 99 |
| Front rise | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 | 28.5 | 29.5 | 30.5 |
| Back rise | 38 | 38 | 38.5 | 39 | 39.5 | 40 | 40.5 | 42.5 | 43.5 |
| Thigh | 28 | 29 | 29.5 | 30.5 | 31.5 | 32 | 33 | 34.5 | 36 |
| Knee | 20 | 20.5 | 21 | 21.5 | 22 | 22.5 | 23 | 24.5 | 26 |
| Leg opening | 17 | 17 | 17.5 | 17.5 | 18 | 18.5 | 19 | 20 | 21 |
| Inseam | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 |
Centimetres; thigh, knee and opening are measured flat. Transcribed from Flâneurs (published in centimetres). Retailers measure differently; confirm with the seller before you buy.
Compare with another model
Quick picks: Studio D'Artisan SD-108 Pure Blue Japan XX-013 Oni Denim 546
Compare with jeans you own
Talk about the J301
No discussions yet. Own a pair, or thinking about one? Start the conversation.
How members wear it
No one has logged photos of the J301 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.
Cut close to the J301
The nearest matches by rise, thigh, knee and opening at size 31, from any maker.
SD-108
楽Relaxed Tapered- Rise cm
- 26.5
- Thigh
- 30
- Knee
- 21.5
- Hem
- 18
XX-013
鋭Slim Tapered- Rise cm
- 27.5
- Thigh
- 31
- Knee
- 21
- Hem
- 18
546
細Slim Straight- Rise cm
- 26.7
- Thigh
- 30
- Knee
- 21
- Hem
- 17.8
JB0601
楽Relaxed Tapered- Rise cm
- 27.5
- Thigh
- 30
- Knee
- 22.5
- Hem
- 17.5