Tokyo’s Heatwave Calls The Grid Into the Hot Seat
On Thursday, Tokyo’s electricity grid groaned under the weight of the hottest June on record, as a surprise plant outage threatened to leave millions of residents in the dark during another blistering day.
When The Sun Feels the Heat
- Temperatures are hovering around 40 °C in parts of the Greater Tokyo area.
- The city, home to 37 million people, is stuck in a six‑day heatwave sparked by the earliest dry spell in decades.
- No cooling-off is expected—heat levels won’t dip below 30 °C until Tuesday.
Power Issues Heat Up
Power firms are pulling nearly 50‑year‑old turbines out of storage, but the sudden shutdown of a 600‑MW plant in northern Japan sent reserve capacity down to a risky 3 %. Below that threshold, blackouts can happen.
- Joban Kyodo Thermal Power Company blamed unexplained technical glitches for the outage.
- They said some sections of the plant had restarted at 1 p.m. (12 p.m. Singapore), with a full return expected later that evening.
- The National Grid Monitor reported reserve levels could drop as low as 3 % between 4:30 p.m. and 5 p.m.
Government Good‑Old‑Day Alert
The Ministry of Economy, Trade & Industry has issued a fourth consecutive power‑shortage warning for the Tokyo area. They advise households and businesses to:
- Save electricity wherever possible.
- Keep blinds, fans and AC running—sudden cuts could push people toward heatstroke.
- Stay hydrated and cool.
Heat Data
Temperatures are the highest since records began back in 1875. As of 1 p.m., central Tokyo was at a sweltering 36.4 °C, while the northern town of Hatoyama hit 39.7 °C.
In short, Tokyo is sweating like a cat in July, and the power grid is trying its best to keep up—without anyone getting scorched in the process.
Turning off the lights
Japan’s Power Squeeze: Companies Flex Their Muscles for Energy Savings
Companies Adapt to the Energy Crunch
When the summer heat rolls in, Japan’s businesses are on the chopping block to keep the lights (and humans) running. Here’s how some of the biggest names are stepping up their power‑saving game.
- Yorozu Corp is trimming some shifts to cut overall energy use.
- Seven & i Holdings and Sony are asking staff to switch off lights and suspend non‑essential devices.
- Nissan Motor is keeping its Tochigi plant humming on generators Wednesday–Friday, while urging all offices to tighten the energy belt.
- SoftBank Corp is raising the thermostat from 25 °C to 26 °C to let the office air feel a bit comfier—and eco‑friendly.
Government Moves to Battle the Heat
Since spring, the government and utilities have been shuffling power supplies to handle the fierce summer demand, which officially kicks in on July 1. The stakes are high because:
- Power plants were phased out after the March earthquakes hit Fukushima.
- The number of thermal plants is dwindling as Japan pushes toward decarbonisation.
- Several nuclear reactors haven’t restarted due to stricter safety rules post‑Fukushima.
Rooting for Gas Under New Guidelines
To keep the lights up, the government and utilities are reviving old gas‑fueled plants and tightening maintenance schedules at nuclear stations. In Tokyo’s outskirts, Jera will bring a 45‑year‑old unit online at Anegasaki this Thursday, followed by a 44‑year‑old unit in Chita on Friday.
In short, while the summer heat is on the rise, Japan’s power players are juggling gears—figuratively—for a cooler, energy‑savvy future.
