Blue Blue Japan
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.
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| Category | Runs | Shape | Length | Size advice | Confidence |
|---|---|---|---|---|---|
| Hoodies & sweatshirts | runs small | relaxed, slightly boxy sweatshirt cut | regular to short, with sleeves that can read shortish | Size up at least one for a normal fit and two if you plan to layer under it. | medium |
| Shirts & overshirts | slightly small | relaxed noragi and kasuri cuts, wide through the body but modest in the shoulder | regular to short, often designed to be worn untucked and open | Size up one unless you specifically want the shorter, closer Japanese proportion. | medium |
| Trousers & pants | true to size | easy, relaxed waist and seat, often with drawstring or elasticated details | often short inseams by Western standards | Take your usual size for the waist but check the inseam, as legs tend to be cut short. | low |
| Jeans & denim | slightly small | regular to relaxed straight leg | regular, with room to cuff | Take your true waist or go up one if the denim is unsanforized, since indigo-dyed cotton can tighten after washing. | low |
| Jackets | runs small | boxy chore and noragi silhouettes with dropped, wide sleeves | short to regular hem | Size up one for layering over knitwear, as Japanese outerwear sizing is tight through the shoulders and chest. | medium |
| T-shirts & graphic tees | runs small | boxy chest with a fairly narrow shoulder | short body, hits above the hip on taller wearers | Size up one from your usual tee size, and consider two if you want length after the indigo cotton shrinks. | medium |
Does Blue Blue Japan run big or small?
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.
How does Blue Blue Japan fit?
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.
How do Blue Blue Japan hoodies & sweatshirts fit?
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.
How do Blue Blue Japan shirts & overshirts fit?
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.
How do Blue Blue Japan trousers & pants fit?
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.
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
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