Hand-Dyed Indigo Tee
Natural plant-indigo dipped jersey tees are the brand's most accessible expression of its fermented-vat dyeing, fading uniquely with every wear.
Explore indigo tees →Brand profile
Tokyo label from Seilin & Co., making Japanese-made clothing dyed with natural plant indigo using shibori, katazome and boro techniques.
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Collections are built around natural plant indigo in fermented vats, with repeated dipping so garments fade as they are worn rather than arriving pre-distressed.
Shibori, katazome patterning, kasuri shirting and boro-style patchwork show up on sweatshirts, noragi and chore jackets as much as on jeans.
Launched in 1996 as the flagship brand of Seilin & Co.'s Okura shop, it is largely made in Japan and now reaches US and European stockists.
Natural plant-indigo dipped jersey tees are the brand's most accessible expression of its fermented-vat dyeing, fading uniquely with every wear.
Explore indigo tees →Boro-inspired patchwork and katazome-patterned noragi and chore jackets are the workwear silhouettes the label built its reputation on.
Explore noragi jackets →Available atDeeCee style
Overall fit
runs small
Shoppers consistently report that Blue Blue Japan uses Japanese numeric sizing that runs about a size small versus US/EU labels, with relaxed but short-bodied cuts and some shrinkage in the heavy indigo-dyed cottons.
Tip: Most non-Japanese buyers go up one size (e.g. a US M usually lands on a size 3), and up two if you are tall or want real layering room.
Medium confidence · based on 12 sources
By category
| Category | Runs | Shape | Size advice |
|---|---|---|---|
| Hoodies & sweatshirts | runs small | relaxed, slightly boxy sweatshirt cut | Size up at least one for a normal fit and two if you plan to layer under it. |
| Shirts & overshirts | slightly small | relaxed noragi and kasuri cuts, wide through the body but modest in the shoulder | Size up one unless you specifically want the shorter, closer Japanese proportion. |
| Trousers & pants | true to size | easy, relaxed waist and seat, often with drawstring or elasticated details | Take your usual size for the waist but check the inseam, as legs tend to be cut short. |
| Jeans & denim | slightly small | regular to relaxed straight leg | Take your true waist or go up one if the denim is unsanforized, since indigo-dyed cotton can tighten after washing. |
| Jackets | runs small | boxy chore and noragi silhouettes with dropped, wide sleeves | Size up one for layering over knitwear, as Japanese outerwear sizing is tight through the shoulders and chest. |
| T-shirts & graphic tees | runs small | boxy chest with a fairly narrow shoulder | Size up one from your usual tee size, and consider two if you want length after the indigo cotton shrinks. |
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
88% matchNatural indigo and plant dyes with artisan hand-craft
What changes: India-based craft partners, more psychedelic/crochet leaning
85% matchTraditional natural dyeing applied to soft tailoring
What changes: Korean craft context, more tailored and less workwear
80% matchHand-woven, hand-dyed indigo pieces from artisan looms
What changes: Tiny LA-run production, textile-art focus over wardrobe range
78% matchGarment-dyed, hand-finished natural-fibre workwear shapes
What changes: French artisanal minimalism, no indigo-vat identity
Blue Blue Japan runs small. Most non-Japanese buyers go up one size (e.g. a US M usually lands on a size 3), and up two if you are tall or want real layering room. Shoppers consistently report that Blue Blue Japan uses Japanese numeric sizing that runs about a size small versus US/EU labels, with relaxed but short-bodied cuts and some shrinkage in the heavy indigo-dyed cottons.
Shoppers consistently report that Blue Blue Japan uses Japanese numeric sizing that runs about a size small versus US/EU labels, with relaxed but short-bodied cuts and some shrinkage in the heavy indigo-dyed cottons. Overall shape: generally relaxed and boxy through the body but cut on a Japanese frame, so narrower in the shoulders and chest than the silhouette suggests.
Blue Blue Japan hoodies & sweatshirts runs small. Size up at least one for a normal fit and two if you plan to layer under it. Shape: relaxed, slightly boxy sweatshirt cut.
Blue Blue Japan shirts & overshirts fits slightly small. Size up one unless you specifically want the shorter, closer Japanese proportion. Shape: relaxed noragi and kasuri cuts, wide through the body but modest in the shoulder.
Blue Blue Japan trousers & pants fits true to size. Take your usual size for the waist but check the inseam, as legs tend to be cut short. Shape: easy, relaxed waist and seat, often with drawstring or elasticated details.
BLUE BLUE JAPAN is the flagship label of Tokyo's Seilin & Co., launched in 1996 as the house brand of the company's Okura store. It builds collections around natural plant indigo dyeing, with fermented vats, shibori and katazome patterning, and boro-inspired patchwork applied to sweatshirts, noragi and chore jackets, kasuri shirting, hand-dyed tees and denim, largely made in Japan. Repeated dipping produces garments that fade with wear. The brand made its first sportswear collaboration with PUMA in December 2023 and sells through Japanese stores plus US and European stockists.