Japanese power prices climbed to their highest level in over three years as a heat wave boosted electricity demand and disruptions to fuel supplies from the Middle East drove up generation costs.
The nationwide next-day power price rose 20% from the previous week to 25.18 Japanese Yen ($0.16) a kilowatt-hour on Monday, the highest since January 2023, according to the Japan Electric Power Exchange.
The Japan Meteorological Agency has warned of unusually hot weather across the country from Wednesday.
Temperatures in areas around Tokyo and Kansai are forecast to reach 35 degrees Celsius (95 degrees Fahrenheit) on Tuesday and Wednesday, while Nagasaki could reach 37 degrees Celsius on Wednesday.
Higher fuel costs are adding to pressure on power prices. Spot liquefied natural gas prices in Asia are currently more than double their levels before the US and Israel began attacks against Iran in late February, raising costs for Japan, which relies heavily on LNG for electricity generation.