Question for people who have recently traveled to Japan with their Japanese spouse

I would like to travel to Japan in Oct with my Japanese spouse. One of the required documents to apply for the eVisa is our Koseki. I don’t have a copy at the moment. I am able to get a copy from a family member via email and would then be able to attach it to my eVisa application.

My question is do they ask for the Koseki when you arrive in Japan? Or is just showing the eVisa enough for them to let you into the country?

I am curious what documents they want when you physically arrive and what questions they ask you. If they ask for proof of marriage or something like that.