1. Project Overview
This project aims to create cooling spaces and visualize environmental data for primary schools and outdoor events within Shibuya. Through this initiative, we will install cooling spots, provide heatstroke warning information to raise awareness of heatstroke countermeasures, and analyze the acquired data.
2. Background and Challenges
Shibuya, characterized by its valley-like topography and high-density buildings, experiences significant heat accumulation. With a daytime population exceeding 500,000, urgent measures are required to prevent heatstroke among event participants and residents, particularly during summer months.
This project, adopted by the Ministry of the Environment as the Model Project for Promoting Effective Heatstroke Countermeasures in Local Governments 2024 (page in Japanese), aims to create cooling spaces and visualize environmental data at elementary schools and outdoor events within Shibuya.
3. Implementation
Heatstroke prevention measures were implemented at locations including Jinnan Elementary School and at outdoor events. This involved installing Cool Spots (outdoor air conditioners) and displaying real-time heatstroke alert information on panels. By analyzing data obtained through these activities, it contributed to creating a safe and secure community in Shibuya.
【１】Shibuya Ward Jinnan Elementary School
- Equipment Installed: Outdoor air conditioner ×1 unit
- WBGT index measuring thermometer (heatstroke sensor)
- Heatstroke alert information panel
【２】Tokyu Plaza Harajuku "Harakado" (6-31-217 Jingumae, Shibuya Ward, rooftop terrace)
- Equipment installed: Outdoor air conditioner ×1 unit
- Electronic WBGT index measurement thermometer
【3】 Shibuya PARCO (**15-1 Udagawacho, Shibuya Ward Shibuya PARCO Hulic Building), “Cool Down Kōen-dōri” Water Sprinkling Event
- Equipment installed: Outdoor air conditioner x1 unit
- Electronic WBGT index measuring thermometer
【４】 Shibuya Cast (1-23-2 Shibuya, Shibuya Ward)
- Equipment installed: Outdoor air conditioner x3 units
- Cool mist units x3
- Electronic WBGT index measuring thermometer
4. Findings
At Jinnan Elementary School, real-time heat index (WBGT) data was utilized to inform decisions regarding outdoor activities. The heatstroke alert display panel was evaluated as enabling "reassuring countermeasures" because it allowed pupils and parents to instantly assess heatstroke risks. The installation of Cool Spots provided temporary relief from the heat, enabling outdoor activities in a healthier and safer environment.
At Shibuya PARCO, visitors commented, "I was sweating buckets walking here, but it was great to cool down." Additionally, the water sprinkling activity on Park Street Shopping Arcade was confirmed—in real time—to effectively lower temperatures.
At the Harakado rooftop terrace and Shibuya Cast events, staff feedback included: "having the cool spots is a relief, keeping us cool even in the daytime heat," and "visitors are enjoying the coolness while they're here."
5. Future Outlook
Through these initiatives and experiences, we have confirmed that real-time data verification and the utilization of cool spots are effective measures for preventing heatstroke. Moving forward, we aim to expand such initiatives across all areas, striving to embed consideration for both comfort within urban environment and public health.
