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. Underwear makers run campaigns tied to this date; for example, Wacoal Corp. established "Wacoal's Pantsu Day," which is registered with the Japan Anniversary Association, to encourage people to pay more attention to their underwear and choose pieces that suit them.

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 a good time to take a fresh look at our underwear. The day has become an occasion to replace underwear with cleanliness and comfort in mind.

• The wordplay: "Pan" (8) + "tsu" (2) → August 2nd.
• A day used by companies: Underwear makers use it to highlight comfort, design, and functionality.
• A trigger for replacement: It has also become a day to review your underwear with summer hygiene in mind.

Where the Word "Pants" Comes From

The Japanese word "pantsu" comes from the English "pants," which is short for "pantaloons." That word is said to trace back to Pantalone, an old man in tight trousers who appears as a stock character in the Italian commedia dell'arte.

Fun Facts About Underwear Day

• The evolution of underwear: Materials and functions such as moisture-wicking and odor resistance have become increasingly varied.
• Underwear as fashion: From sportswear to statement pieces, the range of uses and designs has expanded.
• "Pants" means different things in different places: In the UK, "pants" mainly means underwear, while in the US it means trousers. In Japan, too, "pantsu" is increasingly used for trousers in general.
• Other days on the same date: August 2nd also has other pun-based days, such as Herb Day, Habu Snake Day, and Harp Day.

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.
• Check the materials and care labels to make your underwear last longer.

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.