Tennou Heika (His Majesty, the Emperor; known as Emperor Akihito in foreign media) did today commemorate the 20th anniversary of his ascension to the Chrysanthemum Throne with a private visit to the tomb of his father, the Showa Tennou (named Hirohito in his youth; known as Emperor Hirohito in foreign media).
Their Highnesses, the Crown Prince and Princess, did host a small observance at the palace.
(May his reign live on for)Ten Thousand Years(ever)!
Personal note: I had the rare pleasure of attending His Majesty's 10th anniversary, and the memory shall stay with me always. The average kokumin (roughly: citizen) may no longer be particularly reverential in modern-day Japan, but you sure would not have thought so had you seen the crowd on the approaches to the Imperial Palace that day.