A reader wrote in asking for some advice on issues related to paternity and marriage:

I am a foreign woman, married to a Japanese man. However, now I am pregnant, and my husband is not the father of my baby. His/her biological father is another man.

Can my baby use the family name of his/her biological father? I want my baby to use the name of his/her true father, not of my husband. I hope you can answer my question.