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The subtle irregularity of the yarn gives the fabric depth and character from the start.
Orange stitching against deep indigo, original buttons, a leather patch, and classic flasher details all reflect the history and identity of the brand.
Basic in shape, but rich in expression, the fabric’s uneven texture and deep indigo color give the jeans a powerful presence.
Wear it as a set with the matching ISHIKAWADAI RG JACKET, or break it in on its own.
■ Out of Stock Items
S1953R (001R) ISHIKAWADAI RG STRAIGHT
¥46,800
Sale price
¥46,800
Regular price
ISHIKAWADAI RG STRAIGHT. A jean that carries the memory of Japan’s first denim-making era.
Reconstructing the atmosphere of the time when BIG JOHN first created jeans in Japan, the ISHIKAWADAI RG STRAIGHT is a special model rooted in the brand’s origin.
■ ISHIKAWADAI RG
The ISHIKAWADAI series represents one of the most meaningful chapters in BIG JOHN history.
This model is made with a deep respect for Japan-made craftsmanship, bringing together historical details, authentic fabric character, and a timeless straight fit.
■ Fabric — 13oz African organic cotton denim
The fabric is a 13oz denim made with African organic cotton.
The yarn is spun using a vintage Ishikawadai spinning machine, creating a rustic and powerful uneven texture that cannot be achieved through modern uniform spinning.
The subtle irregularity of the yarn gives the fabric depth and character from the start.
With wear, whiskers, fading, and natural abrasion begin to appear, allowing the denim to develop a strong and personal aging expression over time.
■ Concept — Returning to the origin of Japanese denim
This model is intentionally made without selvedge denim, recreating the spirit of the denim BIG JOHN first produced in Japan.
Rather than simply chasing vintage aesthetics, it looks back to the true starting point of Japanese denim-making — a perspective that only BIG JOHN can bring to life.
Orange stitching against deep indigo, original buttons, a leather patch, and classic flasher details all reflect the history and identity of the brand.
Every element is designed to carry the mood of BIG JOHN’s earliest denim era into the present.
■ Silhouette — STRAIGHT FIT
The silhouette is a classic STRAIGHT FIT.
Not too slim and not too wide, it offers a natural line that lets the strength of the denim speak clearly.
Basic in shape, but rich in expression, the fabric’s uneven texture and deep indigo color give the jeans a powerful presence.
Easy to pair with T-shirts, shirts, sweatshirts, jackets, and workwear pieces, this is a dependable everyday jean made to become the center of your wardrobe.
Wear it as a set with the matching ISHIKAWADAI RG JACKET, or break it in on its own.
The more it is worn, the more it reveals the story of BIG JOHN’s heritage and the origin of denim-making in Japan.
■ Product Details
• Style No.: S1953R
• Product Name: ISHIKAWADAI RG STRAIGHT
• Color No.: 001R
• Material: 100% cotton
• Fabric: 13oz denim made with African organic cotton
• Country of Origin: Made in Japan
• Silhouette: Straight fit
■ Key Features
• ISHIKAWADAI RG series by BIG JOHN
• Inspired by the era when BIG JOHN first made jeans in Japan
• 13oz denim made with African organic cotton
• Yarn spun on a vintage Ishikawadai spinning machine
• Rustic uneven texture with authentic depth
• Non-selvedge construction inspired by BIG JOHN’s earliest Japanese denim
• Deep indigo color with orange stitching
• Original buttons, leather patch, and classic flasher details
• Timeless straight fit
• Made in Japan
■ Size Guide (cm)
| Size | Waist | Inseam | Thigh | Knee | Hem | Hip | Rise |
|---|---|---|---|---|---|---|---|
| 28 | 73.0 | 82.0 | 28.8 | 23.0 | 19.5 | 94.6 | 28.0 |
| 29 | 75.5 | 82.0 | 29.4 | 23.5 | 20.0 | 97.1 | 28.5 |
| 30 | 78.0 | 82.0 | 30.0 | 24.0 | 20.5 | 99.6 | 29.0 |
| 31 | 80.5 | 82.0 | 30.6 | 24.5 | 21.0 | 102.1 | 29.5 |
| 32 | 83.0 | 82.0 | 31.2 | 25.0 | 21.5 | 104.6 | 30.0 |
| 33 | 85.5 | 82.0 | 31.8 | 25.5 | 22.0 | 107.1 | 30.5 |
| 34 | 88.0 | 82.0 | 32.4 | 26.0 | 22.5 | 109.6 | 31.0 |
| 36 | 93.0 | 82.0 | 33.6 | 27.0 | 23.5 | 114.6 | 32.0 |
| 38 | 98.0 | 82.0 | 34.8 | 28.0 | 24.5 | 119.6 | 33.0 |
■ Size Guide (inches)
| Size | Waist | Inseam | Thigh | Knee | Hem | Hip | Rise |
|---|---|---|---|---|---|---|---|
| 28 | 28.7 | 32.3 | 11.3 | 9.1 | 7.7 | 37.2 | 11.0 |
| 29 | 29.7 | 32.3 | 11.6 | 9.3 | 7.9 | 38.2 | 11.2 |
| 30 | 30.7 | 32.3 | 11.8 | 9.4 | 8.1 | 39.2 | 11.4 |
| 31 | 31.7 | 32.3 | 12.0 | 9.6 | 8.3 | 40.2 | 11.6 |
| 32 | 32.7 | 32.3 | 12.3 | 9.8 | 8.5 | 41.2 | 11.8 |
| 33 | 33.7 | 32.3 | 12.5 | 10.0 | 8.7 | 42.2 | 12.0 |
| 34 | 34.6 | 32.3 | 12.8 | 10.2 | 8.9 | 43.1 | 12.2 |
| 36 | 36.6 | 32.3 | 13.2 | 10.6 | 9.3 | 45.1 | 12.6 |
| 38 | 38.6 | 32.3 | 13.7 | 11.0 | 9.6 | 47.1 | 13.0 |
■ Measuring Guide
For details on how to measure, please refer to the size guide.
■ Notes
Measurements are taken flat. Slight variations may occur.
This product uses indigo dye. Fading and color transfer may occur with wear and washing.
Please be careful of color transfer to light-colored garments, accessories, bags, car seats, or furniture.
Shrinkage may occur after washing.
Please avoid tumble drying.
Please check the care label before washing.
Do not use chlorine bleach.
■ Out of Stock Items
For sizes currently out of stock, inventory may still be available at our directly managed stores.
Please feel free to contact us for availability or future restock information.
*When contacting us, please include the product style number, color, and size.
Contact us here
- ISHIKAWADAI RG STRAIGHT by BIG JOHN
- Inspired by the era when BIG JOHN first made jeans in Japan
- 13oz denim made with African organic cotton
- Yarn spun on a vintage Ishikawadai spinning machine
- Rustic uneven texture with deep indigo character
- Non-selvedge construction based on BIG JOHN’s earliest Japanese denim-making
- Classic orange stitching, original buttons, leather patch, and flasher details
- Timeless straight fit
- Made in Japan
- Designed to develop fading, whiskers, and character with wear
The memory of Japan’s first denim-making era.
A rugged 13oz denim with Ishikawadai-spun character.
A BIG JOHN straight fit built to carry history, age, and become your own.