In 1912, Mayor Yukio Ozaki of Tokyo gave 3,000 cherry blossom trees to (assumedly, the Mayor of) Washington, D.C, as a symbol of friendship between the two countries. As the cherry blossoms have continued to blossom, as have the dogwood trees that Washington sent to Tokyo, the friendship between the two countries–however strained in time of the two World Wars–continues to this day. The aesthetic beauty has of the trees, in both countries, remains but a beautiful symbol of that lasting relationship.
The cherry blossom trees have become a primary tourist attraction in Washington, D. C, especially around the Washington Mall. Every April, the City holds the Cherry Blossom Festival. If you are ever in the D, C. area, around this time of year, make a special effort to visit the area around the Tidal Basin. You’ll never regret it!
I encourage you to view the linked advertisement from the NY Times, which was paid for by the Embassy of Japan, entitled “The Magic of Cherry Blossoms: Honoring the Friendship of Two Nations”: http://paidpost.nytimes.com/embassy-of-japan/the-gift-of-cherry-blossoms-honoring-the-friendship-of-two-nations.html?WT.mc_id=2016-March-NYTNative_ArticleMod-Japan-0318-0417&WT.mc_ev=click?action=click&module=Marginalia®ion=Marginalia&pgtype=article&version=PaidPostDriver