Spring in Japan normally means cherry blossoms and hanami (viewing cherry blossoms). Normally, people picnic under the blooming cherry trees. It is a very important time in Japan. Last year we were warned against hanami parties because of the increasing cases of coronavirus, which was just then being named a pandemic. This year we are still not over the pandemic and with vaccinations just starting, it will be a long time before we are.
In Tokyo, it's not enough to just warn people about not holding sakura viewing parties, some city parks are cordoning off the areas to prevent the spread of the virus. Everyone everywhere is tired of distancing and staying home, but Tokyo and the surrounding prefectures are still under a "state of emergency". Tokyo Governor Koike wants people to avoid non-essential outings.
Here is the updated Cherry Blossom Forecast for Japan. It looks like March 20 for my area.