Yoshii: When that girl goes to school, please let her use your family name.
Daikichi: Hah? My family name?
Yoshii: If her surname is different from that of her guardian, I'm sure she'll have a rough time... Would you just promise me that?
Daikichi: I know where you're coming from, but... But I can't promise that... She's always been Kaga Rin up to now... I don't think a person's name is such a simple thing to change...
Yoshii: I'm a woman, so I don't have any great affection or attachment to my family name. One day, it might change anyways... Rin's a woman, too, so she probably feels the same way.
Daikichi: Yeah, but Rin's still six... And that's not what I'm talking about. Besides which, it's just your own personal opinion!
Yoshii: There's only one thing that's important! And that's her name, "Rin", which Souichi-san gave her.

Dear Japan,
Please grow up. At least Daikichi seems to understand that people, even women, can have attachment to their names, regardless of societal mandates upon marriage.