Japanese residents are being warned to stay vigilant as changeable spring '4K' weather patterns are predicted during a three-day break. The term '4K' is commonly used in Japanese weather speak to represent 'Kumori (cloudy), Kosame (light rain), Kaze (wind),' and 'Kawarimi (changes in the weather).' Authorities are reminding people to check the weather forecast before any outdoor activities to ensure safe and pleasurable holiday enjoyment.

Japan is a country where the weather changes frequently due to its geographical location, which has a considerable impact on the citizens' daily life. The varying seasons and weather patterns, such as the '4K,' significantly affect outdoor activities, people's health, local farmers, and the overall economy. Therefore, forecasts and weather warnings are thoroughly disseminated and taken seriously within the country.

In the US and the EU, weather-related warnings are also taken profoundly, particularly in cases of extreme weather conditions such as hurricanes or heatwaves. However, unlike in Japan, there isn't a specific term encompassing various weather changes within a short period, making Japan’s '4K' somewhat unique.