100%Plant
By the numbers
The smart read on Pure Blue Japan
Fibre class
Recorded100%
of recorded textile styles are plant-fibre styles
Catalogue scanned
Listing data67 eligible styles recorded · 0 non-textile items excluded
Sourcing
transparency
Partialtransparency
3/5
Fibre-to-garment
Pure Blue Japan composition
67 stylesPlant100%
Animal0%
Synthetic0%
Semi-synth0%
Every entry, recorded
Every recorded entry, with its finding
67 styles100% Plant2026-09-05 checked67 on record
Plant 100%Animal 0%Synthetic 0%Semi-synth 0%
67 styles
| # | Style | Stated composition | Class |
|---|---|---|---|
| 001 | Heavy Duck Cloth 5 Pocket Pants / Relaxed Tapered - Khaki | cotton 100% | Plant |
| 002 | Heavy Duck Cloth 5 Pocket Pants / Relaxed Tapered - Olive | cotton 100% | Plant |
| 003 | Dry Touch Chino Trousers / Wide Straight - Beige | cotton 100% | Plant |
| 004 | Dry Touch Chino Trousers / Wide Straight - Dark Camel | cotton 100% | Plant |
| 005 | Indigo Over-dyed Cotton Tweed Check Shirt - Beige | cotton 100% | Plant |
| 006 | Indigo Over-dyed Cotton Tweed Check Shirt - Brown | cotton 100% | Plant |
| 007 | Indigo Over-dyed Cotton Tweed Check Shirt - Green | cotton 100% | Plant |
| 008 | Indigo Corduroy Curved Pocket Shirt - Indigo | cotton 100% | Plant |
| 009 | Indigo Corduroy Curved Pocket Shirt - Indigo Black | cotton 100% | Plant |
| 010 | 8oz Denim Type3 Shirt - Double Black | cotton 100% | Plant |
| 011 | 8oz Denim Type3 Shirt - Indigo | cotton 100% | Plant |
| 012 | Jacquard Patchwork Shirt - Double Black | cotton 100% | Plant |
| 013 | Jacquard Patchwork Shirt - Double Indigo | cotton 100% | Plant |
| 014 | Indigo Chambray Selvedge Work Shirt | cotton 100% | Plant |
| 015 | Slub Yarn Sweatshirt / Sumi ink | cotton 100% | Plant |
| 016 | Yarn Dyed Sweatshirt / Indigo | cotton 100% | Plant |
| 017 | Yarn Dyed Sweatshirt / Stripe | cotton 100% | Plant |
| 018 | Yarn Dyed Indigo Sweatshirt - Indigo + Black | cotton 100% | Plant |
| 019 | Yarn Dyed Hoodie / Indigo | cotton 100% | Plant |
| 020 | Yarn Dyed Hoodie / Indigo Black | cotton 100% | Plant |
| 021 | 14.5oz Waterfall Denim Type 2 Jacket - Dark | cotton 100% | Plant |
| 022 | 14.5oz Waterfall Denim Type 2 Jacket - Light | cotton 100% | Plant |
| 023 | 14.5oz Waterfall Denim Type 3 Jacket - Dark | cotton 100% | Plant |
| 024 | 14.5oz Waterfall Denim Type 3 Jacket - Light | cotton 100% | Plant |
| 025 | Knit Cap - Charcoal Gray | cotton 100% | Plant |
| 026 | Big Logo Embroidery Sashiko Cap - B | cotton 100% | Plant |
| 027 | Big Logo Embroidery Sashiko Cap - J | cotton 100% | Plant |
| 028 | Big Logo Embroidery Sashiko Cap - P | cotton 100% | Plant |
| 029 | Double Gauze Check Scarf - Indigo | cotton 100% | Plant |
| 030 | Double Gauze Check Scarf - Red | cotton 100% | Plant |
| 031 | Seersucker Indigo Check Shirt (Long Sleeve) - Block Check | cotton 100% | Plant |
| 032 | Seersucker Indigo Check Shirt (Long Sleeve) - Gingham Check | cotton 100% | Plant |
| 033 | Indigo Jersey Crew Neck Long Sleeve T-shirt / Dark Indigo | cotton 100% | Plant |
| 034 | Indigo Jersey Crew Neck Long Sleeve T-shirt / Indigo + Black | cotton 100% | Plant |
| 035 | Indigo Jersey Crew Neck Long Sleeve T-shirt / Middle Indigo | cotton 100% | Plant |
| 036 | Heavy weight Striped Long Sleeve T-shirt - Indigo x Beige | cotton 100% | Plant |
| 037 | Heavy weight Striped Long Sleeve T-shirt - Indigo x Olive | cotton 100% | Plant |
| 038 | 8oz Slub Jersey Long Sleeve T-shirt - Black | cotton 100% | Plant |
| 039 | 8oz Slub Jersey Long Sleeve T-shirt - White | cotton 100% | Plant |
| 040 | Sulfur Dyed Herringbone Work Shorts - Camel | cotton 100% | Plant |
| 041 | 10oz Denim Double Pocket Worker Shorts - Dark Indigo | cotton 100% | Plant |
| 042 | 10oz Denim Double Pocket Worker Shorts - Light Indigo | cotton 100% | Plant |
| 043 | Jacquard Open Collar Short Sleeve Shirt - Random Dots | cotton 100% | Plant |
| 044 | Jacquard Open Collar Short Sleeve Shirt - Saw | cotton 100% | Plant |
| 045 | Indigo Chambray Selvedge Short Sleeve Work Shirt | cotton 100% | Plant |
| 046 | Seersucker Indigo Check Short Sleeve Shirt - Block Check | cotton 100% | Plant |
| 047 | Seersucker Indigo Check Short Sleeve Shirt - Gingham Check | cotton 100% | Plant |
| 048 | Ribbed Cuff Pocket T-shirt - Dark Heather Gray | cotton 100% | Plant |
| 049 | Ribbed Cuff Pocket T-shirt - Indigo Black | cotton 100% | Plant |
| 050 | Ribbed Cuff Pocket T-shirt - Light Heather Gray | cotton 100% | Plant |
| 051 | Ribbed Cuff Henley Neck T-shirt - Dark Heather Gray | cotton 100% | Plant |
| 052 | Ribbed Cuff Henley Neck T-shirt - Dark Indigo | cotton 100% | Plant |
| 053 | Ribbed Cuff Henley Neck T-shirt - Indigo Black | cotton 100% | Plant |
| 054 | Ribbed Cuff Henley Neck T-shirt - Light Heather Gray | cotton 100% | Plant |
| 055 | Heavy weight Striped Short Sleeve T-shirt - Indigo x Beige | cotton 100% | Plant |
| 056 | Heavy weight Striped Short Sleeve T-shirt - Indigo x Olive | cotton 100% | Plant |
| 057 | 8oz Slub Jersey T-shirt - Black | cotton 100% | Plant |
| 058 | 8oz Slub Jersey T-shirt - Indigo | cotton 100% | Plant |
| 059 | 8oz Slub Jersey T-shirt - White | cotton 100% | Plant |
| 060 | Indigo Jersey Crew Neck T-shirt - Dark Indigo | cotton 100% | Plant |
| 061 | Indigo Jersey Crew Neck T-shirt - Black Indigo | cotton 100% | Plant |
| 062 | 14.5oz Teacore Black x Brown Denim - Slim Tapered | cotton 100% | Plant |
| 063 | 14.5oz Teacore Black x Brown Denim - Relaxed Tapered | cotton 100% | Plant |
| 064 | 14oz Indigo Selvedge Denim - Regular Straight | cotton 100% | Plant |
| 065 | 14oz Indigo Selvedge Denim - Slim Straight | cotton 100% | Plant |
| 066 | 14oz Indigo Selvedge Denim - Slim Tapered | cotton 100% | Plant |
| 067 | 14oz Indigo Selvedge Denim - Relaxed Tapered | cotton 100% | Plant |
Instant fibre check
free · no loginChoose a fibre to see its class and whether it appears in Pure Blue Japan’s recorded styles.
Plant · natural
Animal
Synthetic
Semi-synthetic
Elastane
A stretch synthetic fibre, also called spandex or Lycra.
Not found in any of the 67 recorded styles. This describes the current listing record, not unscanned products.
Checked against all 67 recorded styles in this listing.
Your recorded-material checks
Choose what you want to inspect in Pure Blue Japan’s record. This filters recorded findings; it does not assess clinical safety.
Recorded findings for Pure Blue Japan
Showing 5 of 67 recorded entries. Select a class to filter.
- Heavy Duck Cloth 5 Pocket Pants / Relaxed Tapered - Khaki · cotton 100%
- Heavy Duck Cloth 5 Pocket Pants / Relaxed Tapered - Olive · cotton 100%
- Dry Touch Chino Trousers / Wide Straight - Beige · cotton 100%
- Dry Touch Chino Trousers / Wide Straight - Dark Camel · cotton 100%
- Indigo Over-dyed Cotton Tweed Check Shirt - Beige · cotton 100%
Selections apply to this panel only.
The story
About Pure Blue Japan
Owner · Ken-Ichi Iwaya is the owner of Pure Blue Japan.
Pure Blue Japan is a Kurashiki, Okayama denim maker whose fabric is woven at old Okayama mills on vintage shuttle and low tension looms, using premium cotton from the USA and India plus organic cotton in its organic series and rope dyed indigo. Pure Blue Japan discloses cotton origin countries and the Okayama weaving and dyeing region, giving reasonable fibre to garment context for denim. However most of this detail is documented by retailers such as Okayama Denim rather than by the brand’s own site, and Pure Blue Japan names no specific mill, spinner or cotton farm and publishes no formal supplier list.
MaterialsEvery Pure Blue Japan garment is made from cotton and indigo, with selvedge denim woven from yarn that is thread dyed first using the 'Rope Dying' method to create the brand's original fabric in various…
SourcingAll Pure Blue Japan products are entirely produced domestically in Japan, made by Syoaiya Inc. of Kurashiki-city in the Kojima district of Okayama, where Japanese craftsmanship is used for every process including dyeing, weaving, sewing…
End of lifePure Blue Japan is known for its slubby indigo selvedge denim, developed through many trials and errors, and the brand emphasises durability, craftsmanship and enjoying the way indigo ages and changes over years of wear.…
Details
Brand NamePure Blue Japan
Websitehttps://www.purebluejapan.jp/
OwnerKen-Ichi Iwaya is the owner of Pure Blue Japan.
Instagramhttps://www.instagram.com/pure_blue_japan
Certifications
GOTSPure Blue Japan does not hold GOTS certification.
VeganPure Blue Japan clothing brand vegan status is not stated.
Who is behind it
Woman OwnedPure Blue Japan clothing brand is not a woman owned clothing brand.
Verification statusverified
Scan coverage
Sources checkedSaved direct SKU scan CSV: Pure Blue Japan.csv. Row-level URLs retained: 67 of 67.
Last checked2026-09-05
Products in catalogue67
Products read67
Catalogue read %100
How it was readRecalculated SKU by SKU from the saved direct-scan CSV Band column. Plant means the complete SKU was classified as 100% plant fibre; all other textile bands fail the plant test. Unresolved and excluded products are named separately.
Straight talk
Where Pure Blue Japan isn’t perfect
SourcingWhat the record says
Most sourcing detail comes from retailers, not the brand's own site; Specific mill, spinner and cotton farm names not disclosed; No formal supplier or factory list published; No sustainability or certification disclosure
Confirmed at the source
What we read and checked
Read the evidence and its qualifications alongside each finding.
Pure Blue Japan · listing photograph
67 styles
Recorded findings available in this listing
Recorded data
Material evidence across 67 catalogue records
67Cotton mentioned
Recorded mentions can overlap when one style uses more than one material.
At a glance
Recorded features & ownership
Recorded values, with their qualifications retained.
Recorded composition
Plant100%
Animal0%
Synthetic0%
Semi-synth0%
GOTS Brand-attestedPure Blue Japan does not hold GOTS certification.OEKO-TEX® Standard 100 Brand-attestedPure Blue Japan does not hold OEKO-TEX certification.1% for the planet Brand-attestedPure Blue Japan clothing brand 1% for the Planet membership status is not stated.Vegan Brand-attestedPure Blue Japan clothing brand vegan status is not stated.
Materials
Every Pure Blue Japan garment is made from cotton and indigo, with selvedge denim woven from yarn that is thread dyed first using the 'Rope Dying' method to create the brand's original fabric in various shades of specially blended indigo. Pure Blue…
Cotton
Long staple premium cotton; organic cotton (organic series) and recycled cotton weft
Manufacturing
Not disclosed by formal name
End of life
Pure Blue Japan is known for its slubby indigo selvedge denim, developed through many trials and errors, and the brand emphasises durability, craftsmanship and enjoying the way indigo ages and changes over years of wear. Pure Blue Japan makes no claim of…
Certifications & claims
What the sources support
GOTSBrand-attested
Pure Blue Japan does not hold GOTS certification.
OEKO-TEX® Standard 100Brand-attested
Pure Blue Japan does not hold OEKO-TEX certification.
1% for the planetBrand-attested
Pure Blue Japan clothing brand 1% for the Planet membership status is not stated.
VeganBrand-attested
Pure Blue Japan clothing brand vegan status is not stated.
After use
Care, repair & end of life
Take-back or repair
0
Resale
0
The full record
Every field we hold on Pure Blue Japan
The field values retain the source’s wording and qualifications. A preview is shown where the full report is not available to your account.
Certifications 5 fields
GOTSPure Blue Japan does not hold GOTS certification.
OEKO-TEX® Standard 100Pure Blue Japan does not hold OEKO-TEX certification.
Other CertificationsPure Blue Japan is not a certified B Corporation.
VeganPure Blue Japan clothing brand vegan status is not stated.
Factory certificationsNot disclosed
Sourcing & supply chain 11 fields
Cotton. Country of originUSA and India (premium raw cotton); organic cotton used in the organic selvedge series
Cotton. Named farm / region / co-opNot disclosed
Wool. Origin + farm + mulesing statusNot applicable (denim brand)
Other materials. OriginIndigo rope dyed cotton warp; sulphur dyed recycled cotton weft
Spinning mill. Name + countryNot disclosed
Weaving / knitting mill. Name + countryWoven on vintage shuttle and low tension looms at old mills in Okayama (Ibara area), Japan
Cut-and-sew / assembly factory NAMENot disclosed by formal name
Factory. City + countryKurashiki, Okayama, Japan (brand base; Made in Japan)
Publishes a factory list0
Traceability levelFibre-to-garment
Supplier disclosurePartial
Scan coverage & transparency 10 fields
Verification statusverified
Sources checkedSaved direct SKU scan CSV: Pure Blue Japan.csv. Row-level URLs retained: 67 of 67.
Last checked2026-09-05
Products in catalogue67
Products read67
Catalogue read %100
How it was readRecalculated SKU by SKU from the saved direct-scan CSV Band column. Plant means the complete SKU was classified as 100% plant fibre; all other textile bands fail the plant test. Unresolved and excluded products are named separately.
Verified byHTT research (brand policy pages)
Clean & Safe: last checked2026-07-29
How this date was establishedverified
Possible flags 1 fields
Sourcing red flagsMost sourcing detail comes from retailers, not the brand's own site; Specific mill, spinner and cotton farm names not disclosed; No formal supplier or factory list published; No sustainability or certification disclosure
Other recorded details 51 fields
Brand NamePure Blue Japan
ExcerptIs Pure Blue Japan a sustainable clothing brand? See the real fibre breakdown, plant, animal or synthetic, before you buy.
Buy Linkhttps://www.purebluejapan.jp/
Websitehttps://www.purebluejapan.jp/
Ethicshttps://www.purebluejapan.jp/about.html
OwnerKen-Ichi Iwaya is the owner of Pure Blue Japan.
Owner Linkhttps://japan-forward.com/interview-pure-blue-japan-ceo-iwaya-on-his-passion-for-denim/
Contact Emailinfo@purebluejapan.jp
Instagramhttps://www.instagram.com/pure_blue_japan
POCPure Blue Japan clothing brand ownership is identified as people of colour (Japanese).
LGBTPure Blue Japan clothing brand ownership is not identified as LGBTQ+.
Woman OwnedPure Blue Japan clothing brand is not a woman owned clothing brand.
1% for the planetPure Blue Japan clothing brand 1% for the Planet membership status is not stated.
Feature 1Every Pure Blue Japan garment is made from cotton and indigo, with selvedge denim woven from yarn that is thread dyed first using the 'Rope Dying' method to create the brand's original fabric in various shades of specially blended indigo. Pure Blue Japan expresses a strong affection for the beautiful blue of natural indigo, though the site states no fibre percentage.
Feature 2All Pure Blue Japan products are entirely produced domestically in Japan, made by Syoaiya Inc. of Kurashiki-city in the Kojima district of Okayama, where Japanese craftsmanship is used for every process including dyeing, weaving, sewing and distressing. Pure Blue Japan and Syoaiya are completely the same products, manufactured on weaving and knitting machines specially customised for the company.
Feature 3Pure Blue Japan is known for its slubby indigo selvedge denim, developed through many trials and errors, and the brand emphasises durability, craftsmanship and enjoying the way indigo ages and changes over years of wear. Pure Blue Japan makes no claim of GOTS, OEKO-TEX, B Corp, organic or any environmental certification anywhere on its site.
ShippingPure Blue Japan offers free shipping on orders of 16,000 yen or more, tax excluded, nationwide within Japan. For smaller Pure Blue Japan orders, shipping is 1,300 yen for Honshu, Shikoku and Kyushu, 2,000 yen for Hokkaido and 2,500 yen for Okinawa, all tax excluded.
Shipping InternationalInternational shipping is not available for Pure Blue Japan, as delivery is limited to within Japan only. Customers outside Japan are directed to contact Pure Blue Japan to find local distributors.
Shipping NotesPure Blue Japan delivers to Japan domestic addresses only. Free delivery applies to Pure Blue Japan orders of 16,000 yen or more, tax excluded, with rates of 1,300 to 2,500 yen otherwise depending on the region.
Fibre Breakdown67 (100.0%) 100% plant (organic/regenerative cotton, linen, hemp)
Products found67
Products with a fibre list67
Products with no fibre list0
Brand site readablepartially retained in CSV
Unresolved products0
What this meansNo unresolved products in the saved direct scan.
Excluded items0
Why excludedNo non-textile products were excluded.
Cotton. Type / certificationLong staple premium cotton; organic cotton (organic series) and recycled cotton weft
Polyester. Virgin or recycled + sourceNot disclosed
Viscose / bamboo. Wood-pulp source + FSCNot disclosed
Dye house. Name + countryRope (yarn) indigo dyeing in Japan
Sourcing transparency score (1-5)3
Supply-chain summaryPure Blue Japan is a Kurashiki, Okayama denim maker whose fabric is woven at old Okayama mills on vintage shuttle and low tension looms, using premium cotton from the USA and India plus organic cotton in its organic series and rope dyed indigo. Pure Blue Japan discloses cotton origin countries and the Okayama weaving and dyeing region, giving reasonable fibre to garment context for denim. However most of this detail is documented by retailers such as Okayama Denim rather than by the brand’s own site, and Pure Blue Japan names no specific mill, spinner or cotton farm and publishes no formal supplier list.
Where the sourcing info was verifiedhttps://www.okayamadenim.com/blogs/news/pure-blue-japan-the-og-selvedge-jeans
https://redcastheritage.com/collections/pure-blue-japan
https://www.selfedge.com/pure-blue-japan
Summary of findingsBecause Pure Blue Japan’s online store is JavaScript-rendered and blocks automated reading, its full catalogue cannot be scanned to the Throne Standard, so no whole-catalogue fibre percentage is published. A headline figure is only shown once 100% of a range has been read.
What has been read so far is a sample of 67 Pure Blue Japan styles. In that sample:
• 67 styles (100.0%) 100% plant (organic/regenerative cotton, linen, hemp)
These figures describe only that 67-style sample, not Pure Blue Japan’s entire range, so treat them as indicative until the full catalogue can be read.
Dye processLow-impact / GOTS-certified dyes
Dye process sourcehttps://www.purebluejapan.jp/
Overall: where this info comes fromIndependently verified
PFAS / durable water repellentPFAS-free (verified)
PFAS sourcehttps://www.okayamadenim.com/blogs/news/pure-blue-japan-the-og-selvedge-jeans
Take-back / repair scheme0
Resale / resell programme0
Sustainability Score (1-5)5
Score LabelFully natural
Plant Fibre % (natural)100
Total Styles Scanned67
Scan noteDirect saved-SKU scan recalculation: all 67 in-scope CSV rows carry a classification; 67 are fully plant fibre. The saved export retains 67 row-level source URLs. This is a CSV-derived catalogue result, not a fresh source-URL verification.
Full catalogue scanyes
Catalogue-scan qualificationDirect saved-SKU scan recalculation: all 67 in-scope CSV rows carry a classification; 67 are fully plant fibre. The saved export retains 67 row-level source URLs. This is a CSV-derived catalogue result, not a fresh source-URL verification.
Scan method versionThrone Standard direct CSV recalculation 2026.09
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Last checked 2026-09-05 · verified · Ask us to rescan this listing