29 October 2026International edition
Vol. I · No.
29 October 2026
AI IN FASHION
DAILY
The daily briefing on AI in the fashion business
Where fashion meets artificial intelligence.
Luxury and designer houses

Kazuyuki Kumagai

Japan

Kazuyuki Kumagai is a Japanese menswear designer and the founder of the label ATTACHMENT, launched in 1999. His work is known for simple, architectural design that highlights the natural properties of fabrics.

Facts
LabelATTACHMENT
Founded1999
Paris debut2006
TrainingIssey Miyake atelier
Websiteattachment-official.com
Segment
Premium
Categories
Menswear
Sales channels
WholesaleOwn storesE-commerce

What is Kazuyuki Kumagai?

Kazuyuki Kumagai is the designer behind the Japanese menswear label ATTACHMENT, which he launched in 1999. Before choosing fashion he considered careers in music and architecture. After fashion school he learned fabric production and trained in the atelier of Issey Miyake.

History

ATTACHMENT began showing at Paris Men's Fashion Week in 2006, which helped build an international stockist base including Browns in London, L'Eclaireur in Paris and Lane Crawford in Hong Kong.

Products and positioning

Kumagai's approach puts material first. He travels to production regions across Japan and works with craftspeople on yarns and fabrics, and he has taken apart old garments to study their construction. His design is simple and architectural, keeping references subtle so that the drape of the fabric is preserved.

  • Wool is central, making up about 70 percent of the Fall/Winter 2016 collection
  • Wool melton coats are a speciality
  • A 24 piece capsule in Tasmanian Merino wool was made with Woolmark

Why it matters

Kumagai is a representative of Japanese designers who build their reputation on fabric development and close work with domestic mills, an approach that resonates with international menswear buyers.

Frequently asked questions

Who is Kazuyuki Kumagai?

Kazuyuki Kumagai is a Japanese menswear designer who founded the label ATTACHMENT in 1999.

What is Kazuyuki Kumagai known for?

He is known for simple, architectural menswear built around Japanese fabrics, especially wool melton coats.

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