[thrifter]

and even do facial stretches said to reduce the size of their face

Can someone explain this one to me? Is this a weird translation or do people in Japan actually do this?

[rangibaby]

Korean face massage is a fad in Japan at the moment

https://youtu.be/n9mXYIT10Rc

[sdrothrock]

https://www.byrdie.com/facial-massage-technique

It's this kind of thing. It's literally a facial massage, not a translation issue.

[lifthrasiir]

It is a disposable facial mask [1] used for cosmetics. I don't think it is actually able to reduce the face size though ;)

[1] https://en.wikipedia.org/wiki/Facial_mask