In June 2022, high pressure over the Pacific Ocean caused a south to south-westerly flow of air, introducing hotter air from the tropics to Japan, fuelling higher temperatures.

[1] Meteorologist Jodie Woodcock attributed the heat dome to a combination of climate change and La Niña conditions.

[6] Japan's rainy season was declared over on 27 June, 22 days earlier in the year than usual, and the earliest end since 1951.

[4] Tokyo suffered an extreme heatwave one hundred years earlier, which peaked at 35.7 °C (96.3 °F) on 7 August 1922.

[14] Japanese Prime Minister Fumio Kishida told people to ration air conditioning in order to conserve the limited electricity supplies.