What Defines a Signature Style?

A new series exploring how personal style reflects how we live—through the lives and wardrobes of individuals who embody authenticity and purpose. In our first feature of “A Garment That Speaks for Me,” we meet Nozomi Kosaka.

Nozomi Kosaka is the Brand Director and Co-Editor-in-Chief of Business Insider Japan, the Japanese edition of the global economic media Business Insider. Outside of work, she’s also a devoted mother raising two elementary school-aged children.

Through her favorite SOÉJU pieces, we get a glimpse of the values she’s cultivated over more than two decades in media—and of the gentle moments in her everyday life with her children.

A Wardrobe That Doesn’t Make Mornings Harder

The first SOÉJU item I bought was a skirt. At the time, my wardrobe consisted mostly of monochrome skirts and dresses—not necessarily out of preference, but because they were the easiest option.

I tend to be quite impatient, so dresses were ideal. You just put one on and go—no styling needed. That kind of simplicity really worked for me.

What led me to try SOÉJU’s pants was the tagline: “Especially for those who usually wear skirts” and “Especially for those who think wide pants aren’t for them.”
I was aware of the wide-leg pants trend, but since I’m not particularly tall, I always thought they’d be unflattering on me. I never imagined I’d wear them.

I’m not even sure why I chose the mint color at the time, but the messaging caught my attention, and I bought the Drapey Pleated Pants .

When they arrived, I was surprised at how airy and comfortable they were—and how flattering they looked without any tailoring. They balanced my figure and even made my legs appear longer. It was such a revelation that my hesitation toward pants completely disappeared.

Polished but Not Stiff—What I Wear for Work

The mint pants are still a staple in my wardrobe, but for this feature, I chose the Drapey Pleated Pants in blue. My daughter actually suggested them—she often helps me pick my outfits and told me, “I think the blue pants would look great today.”

In my work, I often need to look put-together, but a full suit feels too formal. These pants strike just the right balance. I also rely on the Pleated Wide Pants in navy—between these two, I’m covered for almost any professional setting.

Whether I’m interviewing CEOs or attending events with students, I meet people from all walks of life. Very few wear full suits. Men often wear T-shirts and jackets, while women usually go for blouses or coordinated sets.

I aim to dress slightly more formal than those I’m meeting—without feeling too dressed up. Overly dressy outfits make me feel self-conscious, so simplicity is key.

People at events do notice what you’re wearing. That’s why I rely on SOÉJU’s drapey pleated pants—they’re simple, refined, and always leave a good impression.

Choosing Clothes That Don’t Hurt Anyone

At Business Insider Japan, our editorial theme is “An Economy Fueled by Kindness.” We stand for a more sustainable future, and I serve as a public face of that mission.

After meeting SOÉJU’s founder, Ms. Ichihara, I became convinced the brand shares that philosophy. I deeply trust the thoughtfulness and care behind their creations. As both a working professional and a mother, I find their values resonate with mine. There’s something grounded and sincere about the brand that I admire.

Even in casual settings, I want to wear clothes that make me feel comfortable and confident. That’s why I believe SOÉJU’s wide-leg pants fit me so well.

Profile
Nozomi Kosaka
Executive Officer, Co-Editor-in-Chief, and Brand Director at Business Insider Japan.
She began her career as a consultant at PwC (now IBM Japan) before transitioning into media. She has worked as an editor for PRESIDENT, dancyu, and other publications. Since joining Business Insider Japan in 2018, she has led initiatives such as brand studio development, award programs, and vertical media launches.
Kosaka is a graduate of the University of Tokyo’s Faculty of Letters and has completed the Creative Leadership Program (TCL) at Tama Art University.