The rainy season has officially begun across Japan with most regions now experiencing soggy weather, the weather agency said Sunday.

The season does not occur in Hokkaido, the nation's northernmost prefecture.

The start of the rainy season this year was first declared in Okinawa and Kagoshima Prefecture's Amami region on May 18.

For Okinawa, it was eight days later than the average year, according to the Meteorological Agency.

Regions in western Japan entered the rainy season on May 29, while it began in Tokyo and nearby prefectures on Thursday, a day later than usual.