On Sunday, Members of the Imperial Family gathered at Toshimagaoka Imperial Cemetery to commemorate 50 days since the death of Prince Yoshihito of Katsura. Princess Akiko of Mikasa, who acted as chief mourner at her uncle’s funeral, wore a black veiled pillbox hat.
The ceremony was also attended by Princess Hisako and Princess Tsuguko of Mikasa (seated behind the crown prince) who also wore demure black hats.
Photos from The Asahi Shimbun, The Asahi Shimbun, and The Asahi Shimbun via Getty
Royal Hats 
The Japanese Royal Family has these mourning outfits down pat. These are solemn occasions and not a time for the hat wearer to make a flashy fashion statement but to be respectful, dignified and decorous. I especially like the way the veil is deployed on this simple black hat and I would love to know more about the black jewellery which I understand is kept for these occasions.
I like the high neckline on the dress.
She is a very pretty lady, and even though this was a mourning outfit and hat, I do like it very much. The style of the hat is small and perfect on her. I can see this hat with my very nice favorite black coat for church in the winter.