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RADI-COOL Umbrella Selected at Tokyo's 'My Favorite Umbrella Selection' Event

On September 25, 2025, in the South Observatory of the Tokyo Metropolitan Government Building, an event called 'My Favorite Umbrella Selection' was held by the Tokyo Metropolitan Government. This event aimed to promote the use of parasols against the backdrop of a record-breaking summer heatwave.

Among various entries, the lightweight folding umbrella, 'Zero and' series, with a 55 cm diameter from Ogawa Co., utilizing the innovative radiative cooling material 'RADI-COOL,' was selected as one of the year’s favorite umbrellas. The choice was made considering various aspects, including heat shielding performance and design, with the RADI-COOL designed product receiving high praise.

Tokyo’s Initiative on Parasol Promotion

As part of the 'Zero Emission Tokyo' strategy, the Tokyo Metropolitan Government is strengthening measures to adapt to climate change. This year, umbrellas have gained special attention as an accessible approach to climate change mitigation, with an increase in usage noted among men. During the event, Tokyo Governor Yuriko Koike, along with parasol experts and famous guests, presented the results of a public survey on umbrella usage as well as the latest trends in parasol designs.

Why RADI-COOL Umbrella Was Selected

The RADI-COOL fabric was developed based on research results published in 2017 by a team from the University of Colorado Boulder in the prestigious journal 'Science.' This state-of-the-art material combines high solar reflection rates with exceptional thermal emission properties. It prevents the accumulation of heat from sunlight while efficiently releasing heat absorbed by the material into outer space.

This unique feature allows the RADI-COOL umbrella to block external heat while effectively releasing internal warmth, achieving energy efficiency with minimal power consumption, all while maintaining a comfortable environment.

Statement from Radi-Cool Japan

In a comment regarding the recognition, Radi-Cool Japan’s President Jun He noted, 'We are incredibly honored that our RADI-COOL umbrella was chosen as a “Favorite Umbrella” and can contribute to Tokyo’s Zero Emission strategy. We will continue to focus on product development that centers around our patented radiative cooling technology, working tirelessly towards a future where the comfort of shade is accessible even in blazing heat.'

Product Overview

• - Product Name: RADI-COOL Umbrella
• - Technology: Heat shielding technology utilizing radiative cooling material
• - Features: Up to -10°C cooling sensation compared to ambient temperature (based on company tests), over 99% UV cut rate
• - Purchase Method: Available via official online store and nationwide retail outlets.

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