Movable Flush Toilet: Bridging the Gap Between Climate Change Mitigation and Disaster Response

by SOSHINO YASUHIRO | Sep 21, 2023 | Innovation Stories

Greetings! I’m Soshino, working in the field of humanitarian technology with the Japanese Red Cross Society. Many of you might recognise me from our groundbreaking project: the world’s first hydrogen ambulance by the Japanese Red Cross Society. This time, I am eager to share an innovation that not only addresses disaster relief needs but also aligns with climate change mitigation: our movable flush toilet.

The Essential Role of Sanitation in Crisis Scenarios

In the aftermath of natural disasters such as earthquakes or tsunamis, the paramount importance of sanitation becomes undeniably clear. Past events, notably the Great East Japan earthquake and the Kumamoto earthquake, illuminated the necessity for uninterrupted access to basic amenities like toilets. These pivotal experiences emphasised the dire need for a sanitation solution that is versatile, sustainable, and reliable, even amidst the unpredictabilities of crises.

Innovation Meets Sustainability: The Movable Flush Toilet

The collaboration between the Japanese Red Cross Kumamoto Hospital and Kyushu Electric Power in Japan gave birth to a unique idea: the integration of a photovoltaic system with a water recycling toilet. Thus began our journey, in collaboration with Nishimu Electronics Industries, to develop the movable flush toilet.

Key Features:

Self-sustaining: Operates without reliance on existing water or sewage systems.

Water recycling: Flush water is biodegraded and reused, ensuring minimal waste.

Remote monitoring: With IoT integration, the system’s health and usage can be tracked in real-time.

Why is This Innovation Climate-Friendly?

Since their introduction, these toilets have served many in disaster-stricken areas without the need for extensive installations. Their seamless integration, even in remote parts of Japan, has also significantly reduced transportation emissions and costs. This dual benefit – serving emergency needs and reducing greenhouse gas emissions – solidifies the toilet’s role in climate change mitigation.

Moreover, in peacetime, these toilets cater to areas with limited infrastructure, offering a solution that reduces both costs and environmental impacts. It’s a testament to how innovation can provide a shared solution for both humanitarian challenges and climate change concerns.


Innovation, especially when driven by real-world challenges, has the potential to bring about transformative changes. Our movable flush toilet is a testament to this belief. It’s not just about sanitation; it’s about aligning our disaster relief efforts with the global need for sustainable, climate-friendly solutions.

Thank you for your support and for understanding the essence of our work. Together, we can strive for a world that’s prepared, resilient, and sustainable. If you want to learn more about our project, please click here.

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