Video footage shot using a drone captures the glory of blue nemophila flowers in full bloom at the Hitachi Seaside Park in Hitachinaka, Ibaraki Prefecture, on April 19. (Shinnosuke Ito and Kazuhiro Nagashima)

HITACHINAKA, Ibaraki Prefecture--A sea of blue greets visitors to the Hitachi Seaside Park here.

An estimated 4.5 million nemophila plants are now in full bloom and nature lovers are flocking to the trails that zigzag the flower festooned hillside.

With unseasonably warm weather since late March, the flowers reached their peak about 10 days earlier than usual.

They will be at their best until late April, just before the start of the holiday-studded Golden Week.