Iceland’s renewables offer a model for Japan

Estimated reading time: 5 minutes · Last updated: 2026-08-19

Iceland’s concentrated renewable system — about 85 percent of energy consumption comes from renewables (excluding transport), with roughly 70 percent from hydropower and the remainder from geothermal — explains why household energy costs remain low despite a high cost of living, as first reported by Kyodo. The country’s district pipelines and plentiful geothermal heat let homes and businesses avoid expensive fossil fuels. Japan, by contrast, imports most of its fuels, has over 20 million kilowatts of estimated geothermal resource but generates only 0.3 percent of its electricity from geothermal, and faces steep legal, geographic and cultural constraints on scaling similar systems.

Low utility bills are a lifesaver for our household budget,

Megumi Nishida, a resident of Reykjavik originally from Japan

How Iceland’s system keeps utility bills low

Iceland’s energy model is built on a small population, large local resources and infrastructure that moves heat and power to demand. Pipelines convey geothermal hot water across lava plateaus into urban distribution and directly to buildings; combined with extensive hydropower, that means most household heating and electricity is provided locally rather than by imported fuels.

The reporting notes that renewable supply covers about 85 percent of energy use excluding transport, and that hydropower accounts for roughly 70 percent of electricity with geothermal covering the remainder. Those shares let residents, including the quoted Reykjavik household, maintain lower utility exposure even when other costs such as food are high.

For businesses that are power‑intensive, low wholesale electricity and abundant hot water are a commercial lever. The example of iFarm Iceland—using geothermal heat and LED lighting to run a climate‑controlled vertical farm—shows how consistent, low‑cost energy underpins industrial experiments that would be far costlier where fuel is imported.

Why Japan can’t copy Iceland wholesale

Japan’s resource base and constraints differ sharply. The country has over 20 million kilowatts of geothermal resource on paper, yet geothermal generation contributes only 0.3 percent of electricity today. Much of that potential lies under mountains, national parks or popular hot spring (onsen) areas where drilling is tightly regulated or opposed by stakeholders.

The Fukushima Daiichi crisis in March 2011 pushed Japan toward more LNG and coal imports, raising the base cost of power and increasing reliance on international commodity markets. That makes the idea of switching to local renewables attractive in principle, but the scale problem remains: Iceland meets most household needs for a population of about 380,000; Japan serves over 120 million people across many islands and dense urban centres.

High upfront capital for drilling, the geological uncertainty you only resolve by drilling, and strong opposition from the onsen sector are recurring barriers. The Ministry of Economy, Trade and Industry is nevertheless treating geothermal as a strategic frontier and backing next‑generation approaches such as injecting water into hot bedrock where shallow springs are absent.

Practical lessons Japan can apply and where they stall

Not every element of Iceland’s model is exportable, but parts are transferable. District heating or targeted local heating loops can reduce household exposure to global fuel prices; the Reykjavik example shows how direct geothermal heat distribution cuts reliance on imported fuels for space heating and hot water.

Policy and permitting changes would be needed to unlock even a fraction of Japan’s potential, and developers will have to address onsen concerns with science‑based monitoring and compensation schemes. The reporting highlights enhanced geothermal techniques—injecting water into high‑temperature bedrock—as a technical path that avoids shallow hot‑spring reservoirs and so might ease some local opposition.

Private enterprises already illustrate alternative pathways: a Japanese start‑up, iFarm Iceland, uses geothermal heating and cheap electricity to grow premium strawberries for export, showing that low energy prices change industrial economics and make new business models viable even in a harsh climate.

Two paths if Japan pursues geothermal and district heat

The bottom line

Iceland offers a compact example of how abundant local renewables and heat distribution can shield households and businesses from global fuel swings. The reporting shows clear mechanical lessons—district heat, plentiful hydropower and direct geothermal use—but Japan’s larger population, protected landscapes and entrenched onsen industry make a straight copy impractical. Progress will likely come from targeted pilots, regulatory reforms and technologies such as enhanced geothermal that avoid shallow hot springs; each step must address drilling risk, upfront finance and local stakeholder concerns before the country can convert a fraction of its 20 million kilowatt resource into scaled, low‑cost heat and power.

What to watch

• Watch for Ministry of Economy, Trade and Industry announcements on geothermal pilot programmes; no date has been set.
• Watch for any legal or regulatory decisions on geothermal drilling in protected or onsen areas; no date has been set.
• Watch for published results or scaling plans from private pilots using enhanced geothermal or non‑spring bedrock injection; no date has been set.