The standard time zone in Japan is Japan Standard Time [JST] and is nine hours ahead of Greenwich Mean Time [GMT]. There are no other time zones in Japan, and daylight-saving time is not in effect. By the seasonal changes in the temperature and the weather, brings charm every season in Japan. Being a north to south long archipelago, the weather in Japan is complex, and the climatic zones differ widely from the north [subarctic] to the south [subtropical]. The climate also differs from the sides of the high mountain ranges located in the center of the archipelago, the Sea of Japan side and the Pacific Ocean side. In addition, the weather conditions vary depending on the time of the year and the region, due to the air masses formed by the seasons.

The time differences between Japan and some of the cities around the world are as follows:
*Daylight saving time is not considered.

Because the Chubu region is towered by 3,000-meter class mountains in the central part, the climate differs on the Pacific Ocean side, the Sea of Japan side, and the inland areas. On the Pacific Ocean side [Aichi, Shizuoka, and Mie Prefectures], precipitation is heavy from spring to fall, and winter is sunny. The Sea of Japan side [Toyama, Ishikawa, and Fukui Prefectures] has heavy precipitation and snowfall from fall to winter. The central highlands [Nagano, Gifu, and Shiga Prefectures] have an inland climate of little precipitation throughout the year, and winter is few in sunny days and short in sunshine hours.

Every season has charms in Japan, brought by the seasonal changes in temperature and weather.
A welcome break from the winter cold, the arrival of spring is celebrated throughout the country with the cherry blossoms from south to north. Spring is cool and breezy, a comfortable time to get out and explore the cities and countryside with usually sunny skies. As the rainy season begins in May to June, leading in to summer.
Throughout Japan, summer is stiflingly hot and intensely humid, so, make sure to be hydrated. The beaches are packed, fireworks over the rivers nationwide, and summer festivals held around every corner. The mountains offer some respite from the major city cauldrons.
As the weather cools, the autumn colors light up the countryside from north to south.
Winter brings many sunny days and beautiful blue skies. Warm up with some hot sake and a bowl of bubbling hotpot.
The average temperatures for the main regions of the central Japan are as follows:
The average monthly temperatures below are in degrees Celsius in 2024.

Source: Japan Meteorological Agency