TL;DR
A new children’s umbrella called Kage no Otomodachi, created by Japanese designers, projects playful shadow characters to encourage kids to use it voluntarily. The design transforms sun protection into a fun activity, addressing concerns about children’s heat exposure.
A Japanese-designed children’s umbrella, Kage no Otomodachi, features playful illustrated characters that cast shadows onto the ground, encouraging children to stay under the canopy for sun protection. The design aims to make using an umbrella a voluntary, engaging activity, addressing increasing concerns over children’s exposure to intense summer heat.
The umbrella, developed by design studio torinoko in collaboration with distributor All Stadium, uses behavioral design principles to turn shade into a game. When opened in direct sunlight, it reveals playful shadow characters on the ground, which children are encouraged to follow, chase, or walk alongside, naturally remaining beneath the umbrella’s protective canopy.
Named Kage no Otomodachi, or Shadow Friends, the umbrella was created in response to rising summer temperatures and concerns about children’s heat exposure. Children tend to be more vulnerable to heat because of their proximity to heat-radiating surfaces and less developed thermoregulation systems. Despite parasols offering protection, motivating children to use them consistently remains a challenge. The design leverages children’s fascination with shadows to promote protective behavior without imposing rules.
The project originated from a collaboration at the Tokyo Metropolitan Government’s Design Management School, where participants explored ways to reduce risks faced by children outdoors. Currently, the umbrella is available in a turquoise-blue color on the Japanese crowdfunding platform Makuake. Future versions may include additional colors and refinements, aiming to foster broader cultural acceptance of parasol use among children.
Innovative Approach to Child Sun Safety
This design matters because it offers a new method to encourage children to protect themselves from heat without relying solely on adult enforcement. By integrating play into sun protection, it could increase parasol use among children, reducing heat-related health risks. The concept also demonstrates how behavioral design can transform health-related habits into engaging activities, potentially influencing future product development and public health strategies.

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Growing Concerns Over Children’s Heat Exposure
Rising global temperatures have led to increasingly intense and frequent heatwaves, raising concerns about children’s outdoor safety. Children are particularly vulnerable to heat due to their proximity to hot surfaces and less efficient thermoregulation. Despite the availability of parasols, many children do not use them consistently, partly because they do not find them engaging. The Kage no Otomodachi umbrella responds to this gap by making sun protection playful and appealing, aligning with broader efforts to promote outdoor safety and heat awareness among families.
“The design cleverly leverages children’s natural fascination with shadows to promote protective behavior without imposing rules.”
— an anonymous researcher

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Unclear Aspects of Future Adoption and Impact
It is not yet clear how widely the umbrella will be adopted outside of the initial crowdfunding phase or how effective it will be in changing children’s sun protection behaviors long-term. Additionally, the durability, safety, and potential for additional features or colors remain to be seen as the product moves toward broader distribution.

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Next Steps for Broader Implementation and Evaluation
The project’s creators plan to monitor the crowdfunding campaign’s success and gather user feedback to refine the design. Future efforts may include expanding color options, testing long-term behavioral impacts, and promoting wider acceptance among parents and schools. Further research will determine the umbrella’s effectiveness in real-world settings and its potential for broader adoption.

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Key Questions
How does the umbrella encourage children to use it?
The umbrella projects playful shadow characters onto the ground, which children are encouraged to follow or walk alongside, making sun protection a fun activity that naturally keeps them beneath the canopy.
What materials is the umbrella made of?
The specific materials are not detailed, but the umbrella features illustrated cutouts and reflective details for visibility during rain or evening walks, suggesting durable, weather-resistant fabric and safety features.
Will there be other colors or designs available?
Yes, the creators hope to introduce additional colors and refinements in future production runs to increase appeal and cultural acceptance among children.
Is this umbrella safe for children to use?
While safety details are not explicitly provided, the umbrella is designed with child safety in mind, including protective materials and reflective features for visibility.
When will the umbrella be available commercially?
The current launch is via crowdfunding platform Makuake; broader commercial availability will depend on campaign success and subsequent production plans.
Source: designboom