The temperature reached 31.3 degrees in Tokyo at 2 p.m. on Saturday, the highest temperature ever for October since records started being kept 138 years ago, according to the Japan Meteorological Agency.

Temperatures have been unseasonably high in central Japan and the Kanto region for the past five days. A warm air mass flowing from the south merged with the season's 24th cyclone, forcing temperatures up, the agency said.

On Saturday, the mercury hit 31.8 degrees in Chiba, 33 in Shizuoka, and 31 in Tochigi and Gunma.

However, normal autumn temperatures are expected for the Kanto region from Sunday, with 26 degrees forecast, then 23 degrees for Tuesday and Wednesday, and 20 degrees toward the end of the week.

© Japan Today