Of course there would be a Japanese sword in another world. Not unexpected at all.
And yes, jap isekai authors LOVE slavery, so that slave beastgirl also came as no surprise.
Even without referring to the raws, it seems clear that quite a few parts are being mistranslated (not to mention the spotty grammar). But that, too, is typical for this genre.
The lowest common denominator factor at work.
Is Japanese
Is from 21st century
Gets isekai'd (to a hyper-fantasized [in the delusional sense of fantasy] version of not-Europe)
Sees slavery
"Wait... What do you mean, I can buy people?"
Not-Europe: Yes.
Your smol Nihonese dick used Harden!
It's ideologically frustrating!
It's really hilarious how, although woke af, it's the western novels that appear to have realistic common sense. For some reason, 9 out of 10 Wajin protagonists tend to completely lack a moral compass and act as if nothing' out of order. I mean... Dude, it's slavery? It's... You know, illegal? Plus, wrong? Literally just wrong, so why are you doing it? Where's your guilt and sense fighting against your fucked perversion?
You can't possibly expect me to believe this guy comes from the so-called peaceful modern Japan.
B r o .
That's
bad writing.