The Flat Head is one of the benchmark Japanese repro Americana-style brands. Founded by Mayashi Kobayashi, a dedicated enthusiast of 1950s American fashion, the brand emerged in 1996, drawing inspiration from music, motorcycles, cars, and architecture of that era, notably influenced by rockabilly culture. The brand has garnered a loyal following, primarily in Asia, and is distinguished by its exceptional craftsmanship and attention to detail.

The brand's signature horsehair jackets, wallets, flannels, T-shirts, and denim, which displays remarkable vertical fading, are renowned and considered top-tier pieces in the market. The brand's philosophy emphasizes that a product achieves its true completion only after it has been worn and personalized by the customer.