First-ever Collaboration between "Sunsun Sponge" and "Sanrio Characters" Realized! Pre-orders for Original Packages Begin April 15th on Official Online Shop!

Dainichi Corporation (Setagaya-ku, Tokyo; Representative Director: Motoyuki Yoshida; hereinafter, Dainichi), a manufacturer and seller of kitchen items such as solid dishwashing detergents and sponges, will begin accepting pre-orders for the limited-edition "Sunsun Sponge" x "Sanrio Characters" collaboration, featuring popular Sanrio characters beloved across generations, on its official online shop starting Wednesday, April 15, 2026.

Sunsun Sponge is a kitchen sponge born from Dainichi's pursuit of "a sponge that pairs well with solid detergents," having previously manufactured and sold solid dishwashing detergents. It is characterized by its use of high-quality polyurethane material, quick lathering, and excellent rinse and drainage properties. It boasts high durability, lasting for over half a year, which also contributes to waste reduction. Furthermore, it arrives in a compressed package of only 7mm, offering excellent storage. The comfort of its use has spread by word of mouth, earning it the No. 1 spot in Rakuten's "Cleaning Supplies Sponge Category" for six consecutive years*1, making it a flagship product of Dainichi that has garnered widespread support.

This project marks Dainichi's first collaboration with Sanrio Characters. The desire of "Sunsun Sponge" to "add excitement to the time spent washing dishes" and the world view of Sanrio Characters, which brightens people's hearts, have merged, resulting in an exceptionally special design that makes you involuntarily exclaim "Cute!" when you look at the package. We hope you will pay attention to the unique expressions that can only be found with Sunsun Sponge in this limited collaboration, which will make your daily dishwashing time a little more enjoyable.

The lineup includes four types: Hello Kitty (Orange Red / Soft), Cinnamoroll (Vanilla White / Soft), My Melody (Pink / Soft), and Kuromi (Purple / Normal). Each original package combines colors inspired by the respective characters with the color of the sponge itself, maintaining functionality while adding a touch of glamour to your kitchen space. Dainichi, while cherishing its corporate philosophy "Shine life. Modestly, brightly.", will continue to spread excitement and smiles in daily life through products that are close to people's lives.

*1 From August 2018 to April 2026 *2 As of March 9, 2025, 21:52

Reservation Site: https://dainichi-corp.co.jp/blogs/sunsun-media/sanrio

First collaboration with Sanrio Characters. A "squishy" cute special design that can only be seen on Sunsun Sponge packaging is born! Sunsun Sponge has consistently supported the indispensable daily task of "dishwashing" with its reliable quality. In this collaboration, the world view of Sanrio's popular characters, beloved across generations, has been combined, resulting in an exceptionally happy and limited design that makes you involuntarily exclaim "Cute!". The biggest highlight is the special expressions that can only be seen on the Sunsun Sponge packaging. Furthermore, please pay attention to the original design where the characters are "squished" into a heart, inspired by the "compressed" feature that is also a characteristic of Sunsun Sponge. A playful visual that links with the compact form before opening has been realized. These unique appearances, which can only be found here, will significantly lift your mood just by placing them in the kitchen. We have packed in such "irresistible cuteness" that you'll want to display them and take photos.

In addition to the classic bright colors, this collaboration also introduces a new purple color (Kuromi / Normal type). With its exquisite hue that accentuates the kitchen space, the lineup combines cuteness with a touch of sophistication.

Of course, it's not just cute. The original functionality of Sunsun Sponge, with its long-lasting design and excellent lathering, is maintained, ensuring both cuteness and practicality. It will appeal to an even wider range of people, not only for daily use but also as an item that meets gift and inbound demand. This collaboration will bring a moment of unexpected joy to daily dishwashing time for both adults and children.

Sunsun Sponge Since its establishment, Dainichi Corporation has been manufacturing and selling solid dishwashing detergents. Through the process of manufacturing and selling, we researched sponges that pair well with solid detergents, leading to the birth of "Sunsun Sponge," which uses high-quality polyurethane and overturns the conventional concept of sponges. It is durable and long-lasting enough to be used for over half a year, contributing to waste reduction. It lathers quickly, and its excellent rinse and drainage properties also lead to water saving. Furthermore, it arrives in a compressed package of only 7mm, so there is no problem with storage space. Such "Sunsun Sponge" has spread by word of mouth and is now a flagship product of our company, having won the No. 1 spot in Rakuten's Cleaning Supplies Sponge Category for six consecutive years*1, and the No. 1 spot in Rakuten's overall real-time ranking in March 2025*2.

*1 From August 2018 to March 2026 *2 As of March 9, 2025, 21:52

Product Overview ・Sunsun Sponge x Sanrio Characters 4-piece set: 1,848 yen (tax included) ・Sunsun Sponge x Hello Kitty 4-piece set: 1,848 yen (tax included) ・Sunsun Sponge x Kuromi 4-piece set: 1,848 yen (tax included) ・Sunsun Sponge x My Melody 4-piece set: 1,848 yen (tax included) ・Sunsun Sponge x Cinnamoroll 4-piece set: 1,848 yen (tax included)

Pre-orders begin on the official online shop from Wednesday, April 15th Pre-order start date: Wednesday, April 15, 2026 *Limited quantity sale General release date: Friday, May 15, 2026 *Orders placed during pre-order will be shipped sequentially from May 15th (Friday) onwards.

Reservation Site: https://dainichi-corp.co.jp/blogs/sunsun-media/sanrio

About Dainichi Corporation Dainichi Corporation is not just a product manufacturer. We are a family-run business spanning three generations over 50 years since our founding in 1973. This is not just history; it guarantees an unwavering commitment to quality unaffected by short-term profits, long-term management stability, and a consistent vision. At the core of our business is the philosophy, inherited from our founder, of "enriching daily dishwashing time." This sentiment forms the foundation of all our product development and promises to our customers. We are confident that this consistent philosophy and long history serve as the most important proof of "trust" for our customers and business partners both domestically and internationally.

The logo design symbolically expresses the core values of the brand. A daily scene of picking up a sponge and lathering, the sun symbolized by the company name and Sunsun Sponge's "Sunsun," hands passing on gratitude. And the character "大" (dai) from "Dainichi" is sublimated into a simple yet powerful design with warm colors. Each of these elements embodies our unchanging wish to not just deliver products, but to brighten our customers' lives through the act of "washing."

Tagline The tagline "Shine life." embodies our determination to continue being a presence that brings sparkle to our customers' lives, now and in the future. Although a short phrase, it condenses our journey so far and our vision for the future. Building on 50 years of history, Dainichi Corporation will continue to walk with its customers as a company that brings new brilliance to life for the next 50, 100 years.

Brand Story: https://prtimes.jp/story/detail/bAv774ijkZB

Brands ▪️Sunsun Sponge "Excitement" for the time spent washing dishes https://dainichi-corp.co.jp/

▪️TEILE Transforming dishwashing into "care" Minimalist, for daily life and travel https://teile.co.jp/

▪️ao A kitchen brand that is gentle on people and the earth, and kind to both skin and environment https://ao-lifestyle.jp/

▪️SUNSUN WASH The new standard solid dishwashing detergent https://dainichi-corp.co.jp/collections/sunsunwash

"SUNSUN WASH" We want to spend our limited time efficiently and comfortably. Sunsun Wash was born to meet such modern lifestyle needs. This solid detergent, which exhibits high cleaning power with just a light touch, is gentle on the hands as it contains plenty of collagen to protect skin elasticity and moisture, and highly moisturizing hot spring ingredients, making daily dishwashing easy and comfortable. Its design, which subtly blends into the sink, does not detract from the kitchen's aesthetic. For over 52 years, we have been pioneers in solid detergents, working to develop and popularize them, and striving to spread their appeal and potential to the world. Sunsun Wash is a confident product born from our years of expertise and original recipe. Sunsun Wash, a new dishwashing detergent that combines ease of use and beauty, is the strongest partner for Dainichi's flagship product, Sunsun Sponge. The initial pre-sale quantity sold out in just two weeks after its launch, earning Dainichi its first-ever second place in Rakuten's dishwashing detergent category*.

* As of February 27, 2025, in the dishwashing detergent category

Sunsun Sponge International Handling Countries/Regions *"Sunsun Sponge" x "Sanrio Characters" is for domestic sales only.

[North America] United States Canada

[Asia] South Korea Taiwan Hong Kong Thailand Indonesia

[Europe] Belgium France Switzerland United Kingdom Germany

◯ Examples of overseas handling ・FRONT GENERAL STORE (Brooklyn, USA) ・Merci (France) ・KADO (Los Angeles, USA) ・Tortoise General Store (Los Angeles, USA) ・Zabars (New York, USA)

Company Profile Company Name: Dainichi Corporation Head Office Location: 3-33-25 Todoroki, Setagaya-ku, Tokyo 158-0082 Phone Number: 03-6432-1789 Representative: Motoyuki Yoshida Established: December 1973 Official Website: https://dainichi-corp.co.jp/ Official Online Shop: https://dainichi-corp.co.jp/collections/sunsunsponge