UV-cut, water-repellent, heat-blocking, contact-cooling "Ultra High Functional Amphibious Wear All four models of "Kumiko OHIKATA x Reir" will be on sale at San-ai Resort official WEB SHOP on April 28 (Tue.)! On sale at San-ai Resort official WEB SHOP on April 28 (Tue)!

2026.04.28 12:00

株式会社Ai

Ai Corporation (Location: Chiyoda-ku, Tokyo; President: Yoshimasa Takatani), which sells swimwear and resort wear, launched "ultra high-function amphibious wear" with UPF50+ UV cut, water repellent*1, heat shielding*1, and contact cooling*1 functions on April 28, 2026 (Tuesday), in collaboration with Kumiko Ohinata. 1), with UPF50+ UV-cut, water repellent*1, heat shielding*1, and contact cooling*1 functions, are now on sale at the official San-ai Resort web shop, some stores*2, and external e-commerce sites*2.

1 The water-repellent, heat-blocking and cooling functions are available only for easy jackets and long pants.

【San-ai Resort】大日方久美子×Reir

San-ai Resort] Kumiko Dainikata x Reir

Following on from the swimwear collaboration, this is the third collaboration between Kumiko Ohinata, a personal stylist, and Reir, a swimwear brand developed by San-ai Resort, which has the top share of the domestic market for fashion swimwear, and Kumiko Ohinata. The lineup includes a total of four models of "ultra-functional amphibious wear" that can be used both for daily use and for waterside and outdoor sports and activities.

Combining Kumiko Ohinakata's lifestyle and amphibious functionality, these one-of-a-kind and special "ultra-functional amphibious wear" can be worn in "daily," "beach," "pool," "sauna," "sports," and "yoga" situations!

To celebrate the launch, an Instagram LIVE will be held on Instagram from 12:00 on Tuesday, April 28, 2012. Archived viewings will be available.

LIVE streaming account

Sanai Resort

@sanai_resort

https://www.instagram.com/sanai_resort/

Kumiko Dainikata Instagram account

@kumi511976

https://www.instagram.com/kumi511976/

Kumiko Ohikata x Reir" product detail page

https://www.san-ai.com/resort-eshop/obinata_reir

Kumiko Ohinakata x Reir

Amphibious] [UPF50+] [Contact cooling] [Water repellent] [Heat shield] Easy jacket

【水陸両用】【UPF50＋】【接触冷感】【はっ水】【遮熱】イージージャケット-1

Amphibious] [UPF50+] [Cool to the touch] [Water repellent] [Heat shield] Easy Jacket-1

With a pocket for keeping coolant. Waist drawstring design. You can enjoy a variety of silhouettes depending on the degree of tightening!

Nylon stretch material with moderate firmness, highest rank UPF50+, with functions of contact cooling, water repellent, and heat shielding. The back design is double-layered with mesh material on the inside.

This "super high-function amphibious wear" can be used for everyday use as well as for waterside and outdoor sports and activities. The rounded hemline is also a key point for easy balancing!

【水陸両用】【UPF50＋】【接触冷感】【はっ水】【遮熱】イージージャケット-2

Amphibious] [UPF50+] [Cool to the touch] [Water repellent] [Heat shield] Easy Jacket-2

Price including tax: 36,300 yen (price of the original 33,000 yen)

Size : 9M, 11L

Color ： White, beige

https://www.san-ai.com/i/55-57-6-7017

Amphibious] [UPF50+] [Cool to the touch] [Water repellent] [Heat shield] Long pants

【水陸両用】【UPF50＋】【接触冷感】【はっ水】【遮熱】ロングパンツ-1

Amphibious】【UPF50＋】【Contact cooling】【Water repellent】【Heat-blocking】Long pants-1

Pockets at the waist to hold coolant. The hem has a drawstring design. You can enjoy various silhouettes by adjusting the drawstring!

Nylon stretch material with moderate firmness, highest rank UPF50+, with functions of cooling to the touch, water repellent, and heat shielding. It has a mesh lining that does not stick to the body.

This is a "super high-function amphibious wear" that can be used for everyday use as well as for waterside and outdoor sports and activities.

【水陸両用】【UPF50＋】【接触冷感】【はっ水】【遮熱】ロングパンツ-2

Amphibious] [UPF50+] [Cool to the touch] [Water repellent] [Heat shield] Long pants-2

Price including tax: 23,100 yen (main body price: 21,000 yen)

Size : 9M, 11L

Color ： White, beige

https://www.san-ai.com/i/55-57-6-7018

Amphibious] [UPF50+] Layer Top Set

【水陸両用】【UPF50＋】レイヤードトップスセット-1

Amphibious] [UPF50+] Layer Top Set-1

Smooth nylon stretch material. Highest rank UPF50+ function included. Cups are made with side panels for a sleek look. The T-shirt set has a waist ribbon. Can be worn in two ways, front and back, so you can enjoy wearing it in any way you like!

This is a "super high-function amphibious wear" that can be used for everyday use as well as for waterside and outdoor sports and activities.

【水陸両用】【UPF50＋】レイヤードトップスセット-2

Amphibious] [UPF50+] Layered Top Set-2

Price including tax: 25,300 yen (main body price: 23,000 yen)

Size: 9M, 11L

Color ： White, Black

https://www.san-ai.com/i/55-57-6-7019

Amphibious] [UPF50+] Leggings with Innerwear

【水陸両用】【UPF50＋】インナー付きレギンス-1

Amphibious] [UPF50+] Leggings with inner lining-1

Smooth nylon stretch material. Designed with an inner layer with the highest grade UPF50+ functionality so you can wear them comfortably without worrying about the shorts hitting you.

The tummy part, which is a concern, is made of non-stretch material and designed to softly press down on the tummy. This is a "super high-function amphibious wear" that can be used for everyday use as well as for waterside and outdoor sports and activities.

【水陸両用】【UPF50＋】インナー付きレギンス-2