Comment Re:Do the Japanese need a lesson in biology? (Score 1) 85
There are many cases of family adopting the son-in-law into the family and continuing their line of name. The registry does allow this happening.
My own family (Chinese) keep two sets of ancestorial plaques exactly for this reason. Sometimes about a hundred years ago, one of my great-father was adopted via marriage into the family and adopted our surname. To honor his line of family, the Lee ancestor family plaque was also keep.