Why Japan and Spain's Aging Populations Are Reshaping Energy Demand
Japan and Spain are running two of the most advanced demographic experiments in the developed world. Japan's over-65 share of the population is among the highest recorded anywhere, and government projections put it on course to keep climbing for decades; Spain's national statistics office expects roughly a third of its population to be over 65 by mid-century. Energy planners have mostly treated this shift as background noise. A new Routledge volume argues it should be treated as a variable in its own right.
Energy Consumption and Aging Populations: Experiences from Japan and Spain, edited by Shigeru Matsumoto (Aoyama Gakuin University), brings household-level data from both countries to bear on a simple question: what happens to energy demand as a society gets old? The answer, laid out across eight chapters, is not a single number but a shift in composition — falling commuter transport demand set against rising residential heating, healthcare, and home-based energy use. The volume builds conceptual models linking aging to societal energy use, then tests them against real consumption patterns in both countries.
For institutions working on the ground, the book supports at least three concrete applications: modelling long-run residential energy demand for utilities and regulators in aging markets; informing pension and social-housing policy where energy cost burdens on elderly households are a growing concern; and providing teaching material for graduate courses that connect demography, environmental economics, and energy policy — a combination few existing textbooks cover in one place.
For university and government libraries building out energy policy or demography collections, this is a title that sits at the intersection of two collection areas that are usually stocked separately. It is a natural companion to existing environmental economics and social policy holdings, and the open-access edition available alongside the print release makes it easier to justify for classroom adoption as well as reference shelving.
CLNZ Books sources this title directly from Routledge for institutions and professionals who need reliable access to specialist energy and policy scholarship, with secure worldwide courier shipping and support for institutional ordering.
Q&A
Q: How does population aging change a country's energy demand profile?
A: It shifts the mix rather than simply raising or lowering total demand — transport energy use tends to fall with retirement while residential heating and healthcare-related energy use rise.
Q: Why compare Japan and Spain specifically?
A: Both are among the most rapidly aging societies in the OECD but differ in housing stock, welfare systems, and climate, making the comparison useful for isolating demographic effects from country-specific policy.
Q: Is this book only relevant to demographers?
A: No — it is written for energy economists, utility planners, and policymakers as much as demographers, with direct application to residential energy forecasting and social policy.
Q: Does the book cover transportation as well as residential energy use?
A: Yes, transportation and mobility among older populations is covered in a dedicated chapter alongside residential and healthcare-related energy demand.
Q: Is an open-access version available?
A: Yes, an open-access edition is available under a Creative Commons license alongside the print hardcover.