Bikini Style Day (Bikini Sutairu no Hi)

What Is Bikini Style Day?

July 5 is "Bikini Style Day." This day commemorates the unveiling in Paris, France, on July 5, 1946, of the swimsuit named the "bikini," which would later spread around the world. The bikini was introduced by Louis Réard, a French automobile engineer who also ran his mother's lingerie business, and marked a major turning point in fashion history.

The Historical Background of the Bikini's Birth

On July 5, 1946, at the outdoor pool Piscine Molitor in Paris, a swimsuit using a remarkably small amount of fabric was revealed to the public, modeled by the dancer Micheline Bernardini. This was the prototype of what we now call the "bikini." The name was taken from Bikini Atoll in the Pacific, where the United States had conducted a nuclear test on July 1, just days earlier.

• Date unveiled: July 5, 1946
• Designer: Louis Réard (France)
• Location: Paris, France

About the Name "Bikini"

The name "bikini" comes from Bikini Atoll, which had drawn worldwide attention when the United States carried out its first postwar atomic bomb test there (Operation Crossroads) on July 1, 1946, just days before the unveiling. Réard is said to have likened his swimsuit to the bomb — small, yet devastating in its impact.

Significance in Fashion History

The arrival of the bikini is regarded as a symbol not just of swimwear design, but of broader shifts in postwar fashion and values. Although it initially drew criticism and was even banned in some places because of how much skin it revealed, it gradually gained acceptance as attitudes changed over time.

• An iconic symbol of postwar fashion
• The diversification of swimwear design
• A turning point in the history of women's fashion

"Bikini Style Day" in Japan

In Japan, July 5 is recognized as "Bikini Style Day" based on the date the bikini was first unveiled to the world. While no official organization has formally established it as a national observance, it's often referenced as a day to look back on the history of fashion and swimwear.

Fun Facts About the Bikini

• The rival "Atome": Around the same time, French designer Jacques Heim created a very similar swimsuit and called it the "Atome" (atom).
• Banned in the U.S. at first: Because it revealed so much skin, the bikini is said to have been banned from most ordinary U.S. beaches until the early 1960s.
• A hit song helped: In 1960, Brian Hyland's "Itsy Bitsy Teenie Weenie Yellow Polka Dot Bikini" reached No. 1 on the U.S. charts, and it was covered in Japan by Kyu Sakamoto and others.
• In Japan: Bikinis were imported from 1950, but they did not become common until the 1970s.

A Memorial Day Marking a Turning Point in Fashion History

Bikini Style Day on July 5 is more than just a swimsuit anniversary—it's a milestone for understanding the mood of postwar society and the evolution of fashion. Learning the facts behind this background can deepen your appreciation of fashion culture today.