Juban and Susoyoke Set

Juban & Susoyoke? Koshi-maki

Set of 2

I believe these are the top and bottom undergarments for kimono.
I'm not entirely sure what they are.

Juban
Japanese clothing
Short sleeve undershirt

Mitsubishi Rayon
Polynosic
Hypolan

Unopened, long-term storage item, but there are small stains.

Susoyoke Koshi-maki

I am organizing items from my mother's move. There are items from the Showa retro era, several decades old. Therefore, even if new, there is a possibility of overlooked stains or scratches due to age-related deterioration. Please understand before purchasing.