About Us
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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. -
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. -
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.
Why Shop With Us
A word from our customers
Let customers speak for us
These are awesome. The details are great and they fit spot on. I would suggest putting a seam in the back -otherwise they are perfect
履き心地もよく、すごくいい感じです。
色もかわいいのでこれだけはいて家の中をウロウロできます。
ミントカラーが追加されるとうれしいです。
あとはもう1つ大きい36のサイズを出してもらえるとすごくうれしいです。
Exactly what I’ve been looking for. I’m so happy they fit.
This is the most cool underwear I have ever seen, so I choose to buy all the colors, and the Japanese production is also the reason for the purchase. I just opened feel very comfortable to wear. Hope more vintage colors come out so I‘ll keep to buy😎
