Costumed visitors to Kotoku-in pay their respects at the mantoukai held in remembrance of the 2011 earthquake and tsunami.
I’m fairly certain this pair is meant to be Yoritomo Minamoto—founder and first shogun of the Kamakura Shogunate, and his consort, Masako Hojo, whose family took on the role of regents of the shogun (and basically run things under puppet shoguns) after the death of Yoritomo. Whether the cosplayers were official or not, I’m not sure, but it was quite neat.
Below is another photo of them. I like this photo better—except for the modern man in the background. Makes me wish my Photoshopping skills were better (or even existed…).