First Collaboration with Popular Stylist Mitsue Ishigami: "Subtly Sweet" Summer Casual Wear for Adults to be Released on April 3

April 2, 2026

Belle Maison, a mail-order business of Senshukai Co., Ltd., is launching its first collaboration with popular stylist Mitsue Ishigami, offering four types of "subtly sweet" summer casual wear for women in their 40s and 50s, designed to address concerns about casual clothes no longer suiting them. The collection will be available on Belle Maison Net from April 3, 2026.

product_launchNQ 84/100出典：PR Times

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📰 Published: April 2, 2026 at 20:10
🔍 Collected: April 2, 2026 at 13:36
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【Product List】https://www.bellemaison.jp/cpg/press/press_260402_018/press_260402_018_index.html

Senshukai Co., Ltd. (Headquarters: Osaka; President: Satoshi Suzuki; hereinafter "Senshukai")'s mail-order business, Belle Maison, will launch four types of casual wear for women in their 40s and 50s on Belle Maison Net (https://www.bellemaison.jp/) on Friday, April 3, 2026. These items were jointly developed for the first time with popular stylist Mitsue Ishigami, who is active in women's magazines such as 'LEE' and 'BAILA' published by Shueisha.

This series proposes a "subtly sweet" adult casual style that mixes "sweetness," "basic," and "modernity." It addresses the concerns of women in the same age group who feel that "their previous casual wear no longer suits them" as they age, offering four items—an all-in-one, an ensemble, a stripe shirt, and printed pants—that balance body coverage with uplifting designs. These are exclusive collaboration products available only at Belle Maison, designed to make "the current you" feel even more wonderful.

【Background of the Collaboration】

Belle Maison has received many concerns from female customers in their 40s and 50s regarding their changing bodies and clothing, such as "casual wear gradually stopped suiting me" and "I want to be fashionable, but I'm concerned about my body shape." To develop "casual wear for adults" that can solve these problems, Belle Maison collaborated for the first time with Mitsue Ishigami, who is highly supported by women of the same generation. Utilizing her knowledge as a stylist active mainly in fashion magazines and her perspective as a woman of the same generation, four carefully crafted items were born, allowing adult women to confidently wear them, with adjustments made from material selection to length, neckline, and sleeve volume.

■ Product Features and Details

1. All-in-one : "Easy and stylish" achieved! An all-in-one that retains "sweetness" without being too masculine.

By combining a slightly glossy material with voluminous sleeves, we created a soft impression that is not too sharp. The waist ribbon allows for silhouette adjustment, and the elbow-length sleeves cover the upper arms, providing body coverage. This all-in-one, which completes an outfit in one piece, is also recommended by Ms. Ishigami.

2. Ensemble

A sophisticated set with a "cool vest" that allows you to confidently enjoy T-shirts.

Responding to voices like "a T-shirt alone feels a bit inadequate, but I don't like over-accessorizing," this is a set of a light and cool vest that can be layered like an accessory, and a T-shirt. The vest features an American sleeve-like cutting to make arms look slender. Layering it with the included T-shirt or a simple top adds an accent to your outfit and creates a neat impression.

3. Stripe Shirt

A "unique shirt" that becomes a strong ally for simple coordination.

This oversized stripe shirt features long sleeves that completely cover the upper arms and a drawstring hem. You can adjust the silhouette by cinching the shirt hem to match the balance with your bottoms, or create a tucked-in look. While the body is loose, the shorter length and adjustable hem allow for easy creation of a well-balanced shirt outfit.

4. Printed Pants

"Patterned pants" that completely change your impression with just one item.

These printed pants feature a chic color scheme and a sharp botanical pattern, making them easy for adult women who prefer simplicity to incorporate into their wardrobe. The ribbon on the left side adds an accent, instantly adding a touch of glamour to your outfit when paired with your existing tops.

【Comment from Stylist Mitsue Ishigami】

I focused on "plus-alpha designs" that make you look wonderful just by wearing them.

Summer, when dressing is easy, can sometimes feel a little lacking with usual simple clothes. So, I created clothes with a "sweet twist" that instantly add cuteness and even cover your body shape just by wearing them. The cut, silhouette, and gorgeous patterns are sure to liven up adult summer fashion! Please pick them up as your daily outing companions.