The storm killed two people, with at least three elderly later confirmed dead due to heatstroke as temperatures soared to above 35 degrees Celsius (95 degrees Fahrenheit) in areas affected by a post-typhoon blackout.
Some 78,700 households were still without power in Chiba, southeast of the capital, Tokyo Electric Co. (TEPCO) spokesman Naoya Kondo told AFP. "A complete recovery is still unlikely until September 27 as we have difficulties in mountain areas," he added.
Some 16,700 households were also without water because several water purification plants had no power, a local official said.