ONI DENIM
【ONI DENIM】200-Kase Natural Indigo Wide Straight Jeans
ONI Kase 鬼枷染
Kase employs a new innovation that combines natural indigo kase-zome (hank dyeing) with rope-dyed core techniques, creating a rich, three-dimensional texture and uneven color depth. This is especially rare due to its fading ability, while all other natural indigo hank dyed denim remains unchanged in color through wear.
This 16oz fabric created by master Oishi-san at ONI delivers natural fading over time due to its slubby, ultra low-tension weave. It stands out for blending historical dyeing methods with modern denim innovation.
What is Hank Dye?
Hank dyeing dyes cotton yarn in loose skeins (hanks) rather than in long, tensioned ropes. The yarn is bundled, tied, and repeatedly immersed in indigo vats, allowing dye to penetrate slowly and unevenly.
Unlike modern rope dyeing—which prioritizes speed, consistency, and shallow dye penetration—hank dyeing accepts variability as a feature, not a flaw.

ONI 200 fit
ONI 200 fit seat on a sweet spot between the popular regular straight like 288 & Wide straight jeans like 222. With the traditional configuration of high waist and wide straight legs, 200 fit focuses on the classic appearance, and cancels the N-shaped brand pocket arcuate design on the back pocket. The plain fabric makes the appearance more minimalistic, and at the same time strengthens the matching possibilities with various items and styles. The wide trousers provide enough space for movement, which can effectively reduce the discomfort caused by humidity and heat in Taiwan's subtropical climate. If you're wearing this in a dry climate, it will give you an unprecedented experience if you are new to wide jeans.
How much does ONI 'Secret Denim' stretch in the waist?
Typically 1.5 - 2 inch (~ 4-5cm) in waist circumference. Basically you can expect them to stretch at least half size more than other Japanese jeans brands. If you have a tummy / belly, go for a safe size. If you’re lean in the stomach, go for a more fitted one.
ONI jeans general size recommendation
Go up at least 2 sizes from major US brands. Usually the same or go down 1 size from other Japanese brands.
Details
- 16oz unsanforized Japanese selvedge denim
- One-wash for us, hence no shrinkage
- 100% cotton
- Natural indigo x white
- Kabuki selvedge ID
- High rise
- Wide straight leg
- Wide leg opening
- Ultra low-tension weaving, superb comfort and short break-in time
- ONI branded doughnut buttons
- Hidden rivet pockets
- Raised belt loops
- Veg-tanned leather patch
- Made in Japan
- Super limited production
*Both 222 & 200 are only produced without pocket arcuate.
Size Chart
| Size | Waist | Front Rise | Thigh | Inseam | Leg Opening |
|---|---|---|---|---|---|
| 28 | 36 cm | 26 cm | 29.5 cm | 83 cm | 21 cm |
| 29 | 37 cm | 27 cm | 30 cm | 83 cm | 22 cm |
| 30 | 39 cm | 27 cm | 31 cm | 83 cm | 22.5 cm |
| 31 | 39.5 cm | 27 cm | 32 cm | 83 cm | 23 cm |
| 32 | 41 cm | 28 cm | 33 cm | 83 cm | 23 cm |
| 33 | 41.5 cm | 28 cm | 33 cm | 83 cm | 23.5 cm |
| 34 | 43 cm | 28.5 cm | 34 cm | 86 cm | 24 cm |
| 36 | 45.5 cm | 29 cm | 35 cm | 83 cm | 24.5 cm |
| 38 | 46.5 cm | 30 cm | 36 cm | 83 cm | 22.5 cm |
【ONI DENIM】200-Kase Natural Indigo Wide Straight Jeans
Frequently Asked Questions
FAQ
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How to find the best sizes?
Most raw denim will shrink roughly 3–5% after the first few washes. If you’re new to raw denim and want to avoid sizing mistakes, we strongly recommend starting with our two essential guides:
The ultimate tutorial to help you shop for the right size in jeans
Advanced Guide for Raw Jeans Shopper for picking the right sizes
These resources walk you through how different brands, fabrics, and constructions affect fit, and why your usual W30 may not translate across every label.
And if you’d like personalized advice, just tap the chat icon in the bottom-right corner — our team is always here to help you choose the size that fits you best.
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How to return / exchange?
We put our customers’ needs at the core of what we do.
So when you find your order unfit / does not match your expectation.
Always feel free to send us an email about how you feel and what your questions are.
Please note that the tshirt /underwear /socks is not applicable for return / exchange.
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How should you wash your jeans?
Never bleach, tumble try, using any fabric softener.
Always put your beloved garments in a wash bag.
Wash with low agitation / low-spin speed.
For your raw denim to evolve and set in shape well,We recommend wearing 6 months straight before doing the first wash.
The more you wear and wash,the lighter the jeans will become.
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General Care & Precautions
Please note that all indigo product including raw denim can “bleed” causing the transfer of indigo blue color from your garments to other surface like white tshirt or light color shoes. The “bleeding” will lessen with wear and after first several washes.
We high recommend you to put all your cloth in a wash bag when doing laundry.Please never use tumble dry on quality goods; never use softener; never use detergent that contain bleach.
If possible, wash your cloth in a low-spin speed to protect the garment.