SAKIGAKE管理人 SAKIGAKE JAPAN provided cold storage and freezing operations for food and beverages at the large-scale outdoor event “Iwata Seaside Dream Fes 2025,” held in Shizuoka Prefecture on November 8–9, 2025.
This festival was hosted by former Japan national rugby player Ayumu Goromaru and EXILE AKIRA, attracting more than 10,000 visitors over two days. As a regional, community-driven event combining sports and music, it offered us an opportunity not only to supply equipment but also to test a new challenge: implementing a fully off-grid cold storage and freezing system designed for disaster-resilient operation.
1. Providing Cold Storage & Freezing for a Large Outdoor Festival
Supporting a 10,000-visitor event with reliable cold infrastructure
The venue, Hamamatsu Seaside Golf Club, featured multiple food vendors, making temperature-controlled food management essential to event operations.
SAKIGAKE JAPAN took on not only standard refrigeration work but also the challenge of proving whether stable cooling could be achieved in an environment with limited electrical infrastructure. This initiative positioned the festival as a real-world testbed to validate our disaster-response technologies in a “non-daily” but high-demand setting.
One-team collaboration with partner companies
This project was carried out in collaboration with:
Together, we jointly managed power supply, equipment operation, and temperature control—bringing a disaster-capable infrastructure lens to an entertainment environment.
2. Achieving Fully Off-Grid Cold Storage & Freezing
Solar power × portable batteries
An outdoor, oceanfront venue involves unstable conditions such as temperature fluctuations, wind, and limited access to power.
To address this, we deployed a complete off-grid system combining solar generation and portable battery storage. Working alongside ECOFLOW, a global leader in battery solutions, we succeeded in maintaining stable refrigeration and freezing without any external power source.
Equipment Used
MOBILE COLD STORAGE BOX 2.2M – Off-Grid Model
(“Traveling Cold Warehouse”)
Key capabilities:
- Triple power compatibility: 100V AC / solar / built-in battery
- Maintains stable temperatures between 5°C and –25°C
- Lightweight modular design for transportability
- Rapid freezing (reaching maximum ice crystal formation zone in under 30 minutes)
- Stable performance even in high-temperature coastal conditions
Verified Practical Performance On-Site
- Stable temperature control despite oceanfront weather conditions
- Measurement of required power for long-term operation
- Collection of load and temperature fluctuation data
These insights directly inform improvements for disaster-response cold-chain solutions, answering the critical question:
“How long can off-grid refrigeration operate under real conditions?”
3. What We Learned: Challenges & New Opportunities
Power constraints at outdoor events
Many outdoor festivals struggle with unstable or insufficient power supply—a challenge shared by disaster sites, community events, and sporting venues.
This demonstration clarified that:
- Mobile cold storage infrastructure
- Power systems independent of external supply
are highly effective for event operations and crisis management alike.
Applications for BCP and municipal resilience
This initiative directly translates into:
- Maintaining cold storage during widespread power outages
- Keeping food and medical supplies cold at evacuation centers
- Flexible power solutions for community events
- New options for mobile infrastructure within BCP planning
Importance of mobile refrigeration in disasters
Fixed equipment is often inadequate in real disaster scenarios.
Mobile cold storage significantly enhances regional resilience and emergency logistics.
4. A Future-Oriented Disaster Model Emerging from the Festival
Connecting everyday use with disaster readiness
This project demonstrated how entertainment environments can strengthen disaster preparedness.
Knowledge gained from festival operations can be fed back into municipal and corporate resilience initiatives—creating a positive cycle between daily life and emergency scenarios.
Community-level use cases
This model can be applied to:
- Local festivals
- Sports events
- Mobile sales
- School activities
- Outdoor markets
Opportunity for future collaboration
SAKIGAKE JAPAN will continue to collaborate with companies and municipalities through:
- Decentralized power systems
- Mobile refrigeration & freezing
- Disaster-response solutions
Our goal is to build flexible, resilient infrastructure that works across both normal and emergency conditions.
5. Conclusion — Bringing Resilience into Everyday Enjoyment
Our involvement in “Iwata Seaside Dream Fes 2025” illustrated how entertainment and disaster preparedness can intersect.
The fully off-grid refrigeration demonstration represents a dual-use infrastructure that enhances both everyday convenience and emergency capability.
SAKIGAKE JAPAN will continue working with regions, companies, and municipalities to build a safer, more sustainable future—where resilience is embedded seamlessly into daily life.
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