The eldest grandchild of Emperor Akihito of Japan, HIH Princess Mako, announces her engagement with a commoner. HIH met her husband-to-be at International Christian University in Tokyo, where the couple were classmates. The Princess will lose her imperial status upon her marriage.
Picture linked from
Daily Mail HIH Princess Mako and her fiancé Mr Kei Komura
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Edit to correct The Tenno's name