Mature Ha is a Japanese hat brand based in Kobe, Japan. Designed for discerning hat enthusiasts, the focus is on exceptional materials, a well-tailored fit, and impeccable construction. Mature Ha is known best for their iconic "boxed hats", a modern take on the classic straw hat that is packable and ideal for travel. with Mature Ha._MIL–helmed by Jumpei Seki of S H– the brand offers a side-project devoted to military-inspired headwear that straddles the line between reproduction and reinvention. the result is a series of hats that express a simple beauty and strong sense of utility.