Rajesh and Kayo Prasad have no doubt they were destined to marry.

In 1996, almost on a whim Rajesh, from Manipur in northeastern India, entered Jawaharlal Nehru University in New Delhi, where he met his future wife, Kayo Shiozaki.

A friend had reminded him the university was holding an entrance exam the next day and on the spur of the moment he decided to take it. If he hadn't taken that exam or hadn't been accepted, he would not have met Kayo, he says.