Strange that Empress Michiko does not wear a tiara. Maybe that, with her age and her frail constitution, she finds tiaras too heavy to wear?
Queen Maxima looks splendid! I hope we will see frontal pictures. I do regret, though, that she did not wear a necklace (yes, I know, I am never satisfied... ).
We can notice that Queen Maxima has her diamond crescent brooch pinned at the back of her shoulder.
Regarding the large bow brooch from the Stuart diamond parure, I confess mixed feelings. I am happy to see this gorgeous jewel resurface after so many years in the vaults. But I do regret that it has been "downsized" to this simple setting. The larger, grander original setting was far better, IMHO. I hope the rest of the brooch has not been dismantled, and that the brooch can be reverted to its original form, if wanted.