they are sons of Prince Kunie Fushimi ;
#1 Prince Fushimi
#2 Prince Kitashirakawa (from Mainichi news)
#3 Prince Komatsu
#5,6 Prince and Princess Higashi-fushimi. maybe, taken on the occasion of a British king's coronation.
photos of their wife and daughters are Here;
http://www.theroyalforums.com/forums...1&postcount=11
http://www.theroyalforums.com/forums...1&postcount=12