In pictures: Cherry blossom season

Japan's Meteorological Agency declared the opening of the "sakura season" on March 22 - that's when more than 80% of a benchmark tree at Yasukuni Shrine came into bloom.

Holding "hanami", or cherry-blossom parties, is a centuries-old Japanese tradition. These women wearing hakamas have just graduated from university.

Parks fill up with workers taking time out from the office, students and old people who come out to see the delicate pink blossom.

The season only lasts about two weeks, so people make the most of it.

This man is reserving a good spot for a hanami with friends or colleagues later.

This is university graduation week in Japan, and students come to the park after their graduation ceremonies for parties or to take photos.

This year's season began six days earlier than average, and one day sooner than had been forecast.