It is the condition that, due to the recent climatic tendency for unusual warm winters, dormancy, which is essential to bring cherry blossoms into bloom, becomes disrupted as ambient temperatures do not stay sufficiently low for a certain period of time in the winter, resulting in their late blooming.
これは、暖冬傾向で桜が開花する条件である冬の間の一定の低温期間が不十分で休眠できずに開花が遅れることとなる。