GOKUMIN: Indoor Air Can Be Up to 5 Times Dirtier Than Outdoor Air? — Sleep-Inspired Air Purifier 'NERU BREEZE' Provided at Parenting Support Event

KURUKURU Co., Ltd. (Headquarters: 13F, GINZA SIX, 6-10-1 Ginza, Chuo-ku, Tokyo; Representative Director: Yasuhiro Sekizawa), the company behind the comprehensive bedding brand 'GOKUMIN,' provided its sleep-inspired air purifier 'NERU BREEZE' as a sponsored prize at the 'Shinshu Child-Rearing Support Festival 2026,' held on Saturday, June 6, 2026, at the Nagano City Lifelong Learning Center. This year marked the fourth edition of the event, attracting 932 families and approximately 3,000 attendees. At the venue, NERU BREEZE was offered as a raffle prize, and original postcards introducing the product and brand were distributed, offering families a chance to reconsider their household sleep environment from the perspective of bedroom 'air quality.'

Event Overview

Event Name: Shinshu Child-Rearing Support Festival 2026

Date and Time: Saturday, June 6, 2026, 10:00–15:00

Venue: Nagano City Lifelong Learning Center (1271-3 Togō West, Tsuruga, Nagano City, Nagano Prefecture, 3rd and 4th floors)

Organizer: Sunmedix Co., Ltd.

Attendance: 932 families, approximately 3,000 people

Event Highlights: Kids' sports day, professional photographer children's photo sessions, picture book readings by SBC announcers, stage shows, lucky draw raffles, gift campaigns, and sponsored exhibition booths

Official Website: https://kosodatefes.sunmedix.jp

Background of Product Sponsorship

[Bringing the Idea of 'Improving Sleep Environment Through Air Quality' to Families]

Indoor air can be 2 to 5 times more polluted than outdoor air (※), according to some reports. Among indoor spaces, bedrooms—where people spend the longest portion of their day—are often overlooked in terms of air quality. Guided by the belief that 'sleep is the beginning of a happy day,' GOKUMIN has extended its expertise in bedding and sleep science to indoor air environments, developing the 'NERU BREEZE,' an air purifier designed specifically to enhance sleep quality.

For families raising children, restful sleep is the foundation of daily energy. Comfortable sleep environments are essential for caregivers managing household duties, parenting, and work, as well as for children growing up healthily. Aligned with the organizers' mission to support local parenting, GOKUMIN decided to contribute by focusing on bedroom air quality, leading to the product sponsorship for this event's gift campaign.

※ Reference: U.S. Environmental Protection Agency (U.S. EPA), 'The Inside Story: A Guide to Indoor Air Quality'

Event Day Highlights

[Delivered to Winning Families as Part of the Gift Campaign]

The event attracted 932 families and approximately 3,000 attendees, creating a lively atmosphere. Various gift campaigns, including a lucky draw wheel, were held. NERU BREEZE was one of the prizes, offering a rare opportunity for families to experience a product they might not otherwise try in-store, allowing them to feel its benefits in their daily lives.

[Presenting 'Bedding for the Whole Family' Through Postcards]

Additionally, original postcards explaining the product and brand philosophy were set up and distributed at the venue. Of the 200 copies prepared, only about 10 remained by the end of the event, indicating strong interest among parenting families in sleep and air quality environments. Many attendees also visited the GOKUMIN official website after receiving the postcards.

※ The claim of '99.9% removal of harmful substances' is based on third-party testing of the filter material alone, measuring 99.97% particle collection efficiency for 0.3μm particles (NaCl) under the following conditions: TSI8130 used, airflow rate of 32L/min, test area of 100cm². This is a value obtained under specific test conditions and does not guarantee removal or reduction of all bacteria and viruses in real-world usage.

Sponsored Product

NERU BREEZE

[Transform Your Room's Air with One Compact Unit] Equipped with a high-performance 4-layer filter (pre-filter + high-performance decomposition filter + HEPA H13 + activated carbon) that tackles pollen, PM2.5, viruses, and odors. Easily transforms everyday spaces like bedrooms, children's rooms, and studies into comfortable environments. Features filter replacement alerts approximately every 6 months (about 2,200 hours), with a one-touch replacement design for easy maintenance.

Future Initiatives and Strategy

Moving forward, GOKUMIN will continue to focus on its core commitment to 'ultimate sleep,' cultivated as a bedding brand, and expand beyond products to support families in creating better sleep environments. Through sponsorships and prize donations at community-based events like this one, the company will nurture direct touchpoints where consumers can experience its brand values firsthand. GOKUMIN aims to deliver products and information that make more households feel confident saying, 'Choosing this was the right decision.' The brand will continue its efforts to expand choices for restful sleep, ensuring that every person, especially families raising children, can start each day with a refreshing and comfortable wake-up.

GOKUMIN: Over 2 Million Units Sold in Series

Because sleep is the beginning of a happy day.

Launched in Japan, the bedding brand 'GOKUMIN' offers high-quality bedding at accessible prices. Thanks to customer support, it has received numerous accolades, including the 'Amazon.co.jp Seller Award 2023 Grand Prize' and achieving a triple crown in the bedding brand category for two consecutive years. The brand continues to earn high praise from customers. To help realize the healthy and fulfilling daily lives advocated by the SDGs, GOKUMIN will keep pursuing products that earn the trust of being 'the right choice.'

Official Website: https://gokumin.co.jp/

Sources

※1 U.S. Environmental Protection Agency (U.S. EPA), 'The Inside Story: A Guide to Indoor Air Quality'

https://www.epa.gov/indoor-air-quality-iaq/inside-story-guide-indoor-air-quality

※2 The claim of '99.9% removal of harmful substances' is based on third-party testing of the filter material alone, measuring 99.97% particle collection efficiency for 0.3μm particles (NaCl) under the following conditions: TSI8130 used, airflow rate of 32L/min, test area of 100cm². This is a value obtained under specific test conditions and does not guarantee removal or reduction of all bacteria and viruses in real-world usage.

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