Key Facts
• June 2025: Shikaoi Town in Hokkaido begins selling locally produced caviar.
• Population: Less than 5,000; Dairy cows: Approximately 30,000.
• Biogas power plant operational since 2007, utilizing cow manure and food waste.
• Surplus heat from biogas power used for sturgeon farming since 2014.
• Ideal water temperature for sturgeon growth maintained at 15–20°C.
• Caviar praised for its rich flavor and smooth texture by experts.
• Residual manure processed into organic fertilizer; heat also used for mango and sweet potato farming.
• Caviar to be marketed locally and offered as a hometown tax return gift.
• Unique low-salt flavor enhances natural umami, suitable for direct consumption.
• Biogas-powered aquaculture adds value to the caviar’s story.
Summary
Shikaoi Town in Hokkaido, known for its dairy farming, has launched a new caviar product using surplus heat from its biogas power plant. The plant, operational since 2007, processes cow manure and food waste to generate electricity. Since 2014, the surplus heat has been used to maintain optimal water temperatures for sturgeon farming, leading to the production of high-quality caviar. Experts have praised the caviar for its rich flavor and smooth texture. The town plans to expand sales locally and include the caviar as a gift for hometown tax donations. This innovative use of biogas power not only addresses odor issues from manure but also supports sustainable agriculture and new business opportunities.
