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Japan’s YouTube Stars “Water Challenge” Release Limited Edition Valentine’s Prints at 7-Eleven

Japanese convenience stores, known as konbini, are more than just retail outlets—they are hubs where you can experience the latest entertainment. Currently, limited-edition “bromide” (collectible photo prints) of the mega-popular YouTube group “Water Challenge” are on sale through multi-function copiers at 7-Eleven stores across Japan.

“Water Challenge” is a highly influential group with a total social media following exceeding 3.97 million. Through this campaign, fans can easily obtain high-quality photos capturing the group’s unique charm.

Water Challenge promotional image

What is “Water Challenge,” the Group Boasting Immense Popularity in Japan?

“Water Challenge” is a YouTube group led by “Sumanai-sensei” and his seven unique students. Their comical storytelling and unpredictable projects have earned them a massive following across generations, from children to adults.

By utilizing 7-Eleven’s nationwide store network, this collaboration provides an opportunity for fans across the country to obtain visuals of their “oshi” (favorite members) at a location close to home.

17 Different Designs with a “Valentine’s Demon” Theme

The theme for these bromides (a common Japanese term for collectible celebrity or character photos) is “Valentine’s Demon.” Special costumes and designs have been created specifically for the February Valentine’s season.

  • Design Variations: 17 types in total
  • Sales Format: Random (The fun lies in seeing which design prints out!)
Water Challenge bromide design lineup
Water Challenge character photo print example

The designs range from solo shots highlighting each member’s personality to lively group photos. The random sales format is enjoyed in Japan much like a “gacha” (capsule toy), where the excitement of trying to get a specific design attracts many fans.

Product Specifications and Pricing

The bromides are printed using high-quality photo paper available within the multi-function copiers. They feature vivid colors and a glossy finish that are difficult to reproduce with home printers.

  • Print Paper: Photo paper
  • Sizes: L-size (approx. 89 x 127 mm / 3.5 x 5 inches) or 2L-size (approx. 127 x 178 mm / 5 x 7 inches)
  • Price (L-size): 300 yen per sheet (approx. $2.00)
  • Price (2L-size): 500 yen per sheet (approx. $3.30)
  • Sales Period: From Sunday, February 1st to Saturday, February 28th

Fans can choose between the L-size, which is convenient for carrying around, or the larger 2L-size, which is perfect for displaying in a room.

Powered by the “e-Print Service”

This sales system is supported by “e-Print Service,” a mechanism widely used in Japanese convenience stores. Using multi-function copiers, users can output a variety of digital content—such as sports newspaper articles, anime prints, and celebrity photos—as physical paper 24 hours a day.

The “Valentine’s Demon” series is available for a limited time until the end of February. It is a precious opportunity to enjoy the world of “Water Challenge” not just on a digital screen, but as a physical item you can keep.

Water Challenge Bromides – e-Print Service 🇯🇵

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