OK, but do we have more data points for these cherry blossoms, or just the one the article is pointing out? How do we know this isn't another random fluctuation for cherry blossoms?
Could it be global warming? Sure, but we need to be careful with our confirmation bias.
>do we have more data points for these cherry blossoms
Yes, the article includes a nice graphic showing the "peak bloom day of the year". It shows that average peak bloom date has been getting steadily earlier in recent history.
The difference is the steep trend in the past 150 years.