The Concept of "Biomass Circulation" in Masuda: A Perspective from Around 2002

The Concept of "Biomass Circulation" in Masuda: A Perspective from Around 2002

Around 2002, Japan was seeking to shift its energy policy from dependence on fossil fuels, with the prevention of global warming and the creation of a recycling-oriented society as key issues. As the Kyoto Protocol was adopted in 1997 and ratified in 2002, the introduction of renewable energy became a realistic policy theme for achieving greenhouse gas reduction targets. At the same time, in rural areas, the stagnation of the agriculture and forestry industries due to population decline and aging and the increase in abandoned farmland were prominent, and how to make the best use of local resources was a serious problem.

Against this backdrop, a "special zone for utilization of waste to biological resources" was conceived for the entire city of Masuda in Shimane Prefecture. This was an effort to relax existing regulations so that wood waste, forest residues, and livestock manure from livestock production could be recycled as energy and fertilizer, rather than being regarded as mere waste. Specifically, a framework was proposed to flexibly promote the conversion of biomass into fuel and compost, subject to regulations such as the Waste Disposal and Public Cleansing Law and the Fertilizer Control Law.

At the time, the city of Masuda, while based on agriculture, forestry, and livestock industry, was facing a declining population and depopulation, and the sustainability of the local economy was an issue. Therefore, this special zone was expected not only as an environmental measure, but also as a regional revitalization measure linked to local industry. Heat supply from woody biomass and energy conversion from livestock biomass had the potential to promote local energy self-sufficiency and shift away from dependence on fossil fuels.

Masuda City's concept is a symbolic example of converting waste from a "burden" to a "resource," and a pioneering challenge toward the realization of a recycling-oriented society. As an experiment in energy conversion from the local level, this special zone attracted nationwide attention.