Underwear Day (Pantsu no Hi)

What is Underwear Day?

August 2nd is "Underwear Day" (Pantsu no Hi). The date comes from a number-sound pun: "pan" (8) + "tsu" (2) = "pantsu," the Japanese word for underwear/underpants. It was established in the 1980s by underwear manufacturers and retailers, with the aim of encouraging people to replace their underwear and to spread awareness of underwear as a fashion item in its own right.

Why August 2nd Became "Underwear Day"

While the wordplay was the original trigger, summer is also a season when we sweat a lot, making it an ideal time to take a fresh look at our underwear. As a result, the day has become an opportunity to replace underwear with cleanliness and comfort in mind.

• The wordplay: "Pan" (8) + "tsu" (2) → August 2nd.
• Spreading underwear culture: Raising awareness of the fashion and functional qualities of underwear.
• A trigger for replacement: Established itself as a campaign focused on summer hygiene.

Fun Facts About Underwear Day

• A uniquely Japanese commemorative day: Few other countries have a similar dedicated "underwear day."
• The evolution of underwear: Functions like moisture-wicking, antibacterial, and odor-resistant properties have steadily improved over the years.
• Underwear as fashion: From statement lingerie to sports underwear, the variety has expanded greatly.
• "Pants" means different things in different places: In Japan, "pantsu" refers to underwear, while in the UK, "pants" usually means trousers.

Ways to Enjoy Underwear Day

• Buy new underwear for a refreshing change of mood.
• Try functional or stylish underwear you haven't tried before.
• Sort through your clothes and replace any worn-out underwear.
• Learn a bit about the materials and construction of underwear.

Something You Wear Every Day Deserves a Little Comfort

August 2nd, "Underwear Day," is a chance to give some thought to something we rarely think about — our underwear. Paying attention to comfort and cleanliness can make everyday life feel just a little more pleasant.