Who is the head of the family register?

It is the person listed at the beginning of the family register. As a general rule, a husband and wife create a new family register at the time of marriage, but at this time, if the husband's name is chosen, the husband will be the head, and if the wife's name is chosen, the wife will be the head. Also, even if the head of the household dies, it will not change like the head of household on the resident card.