This paper studies the feasibility of introducing “eco-friendly self-made insulation materials” on Ogijima, using natural or waste materials available locally. A survey of private homes revealed limited thermal comfort. Four materials, waste bedding, eelgrass, rice husks, and kanna shavings were selected for the insulation. These were found to provide comparable or superior insulation performance to glass wool, with significantly lower CO2 emissions during production, transport, and disposal. These materials were also found to be less expensive. The study concludes that these self-made insulation materials could be a viable alternative for the island’s residents.
