Tagline
Just-right clothing that erases boundaries
FLAT is a Japanese men’s casualwear brand launched on February 27, 2026, by Suit Square, part of Aoyama Trading. It offers outerwear, shirts, pants, T-shirts, vests, and other items as polished casualwear for both work and personal life. Guided by the idea of flattening the boundaries between dress and casual, on and off, and work and personal life, the brand proposes everyday clothing for adults with a neutral sensibility that combines functionality and refinement.
Concept
Dress and casual, on and off, work and personal life. Gently dissolve the “lines” that have kept them separate and make them flat.