• Day One Underwear. About Us. About Day One Underwear. Package Design.

    About Day One Underwear™️

    Underwear used to be a part of men's fashion back in the 1960s & 1970s.

    Our passion is to assist you to be yourself from the inside out.

    Just like the vintage underwear used to do back in the day.

  • made in japan underwear, heritage style. poplin boxer, cotton boxer shorts.

    How We Started

    After collecting tons of vintage, we found the best underwear to make your style perfect.

    We stared from rebuilding the old sewing machine to bring the old soft-cushioned waistband back to the present.

  • Day One Underwear About Us. Who we are.

    Who We Are

    Launched Tapered Boxer Shorts in January 2023.

    Based in Tokyo.

    Our products are all handmade in Japan with craftsmanship, by an underwear factory founded in the 1950s.

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Why Shop With Us

🩳 Vintage Underwear Reproduction
🇯🇵 Made in Japan Quality
✈️ Worldwide Delivery

A word from our customers