Job transfers force some husbands or wives to become tanshinfunin. 
  The number of husbands and in cases wives who leave their families behind when they are transferred by their companies to posts in other cities in Japan or overseas has been increasing. 
 According to a survey there were over 20,000 such husbands in 1985. 
In corporations with over 1,000 employees, one in every five who was transferred relocated without the family. 
Among workers in their 40s, approximately 30% of those transferred relocate alone.
The situation is even more severe for those in their 50s: about 40% of the workers transferred chose to move to another city without their families. 
Today. tanshinfunin has become a common household word in Japan.