I've always wondered if the Taisho coupe are Kurosawa ascendant because of the resemblance with Saeki-san? (kinda forgot his name lol)
....and I was right
Considering the era (it's 20s baby) that kind of gap was normal. Back then, women as young as 15 were considered as age of marriage while men were expected to be settled financially to be ready for marriage.
I know it's still icky but that was the norm back then and I'm glad we live in better era.