Hmm in my expert opinion, those do not look like any swards i have seen-most swards from my understanding dont have metal. They do in fact look like swords though. Hope that helps!
But yes, we need more than that to actually identify the sword, someone could give a blade estimate not a sword one. A lot goes into it like, style of guard, tip, weight, any dimensions. Any proof marks etc.
I by far cant help you, i only know a few European weapons and only a bare minimum of asian ones. (like Katana basically)
Also are these hand made recently, machine made or did you just pick them up somewhere or out of the ground. What are their origins and how did you come to take a picture of it.
What you're showing in the pictures are the nakago (tang) of Japanese (or Japanese style) swords, showing the mei (signature). Typically these show the smith attributed, or a date, or sometimes a particular achievement in testing (such as the number of bodies cut during tameshigiri/suemonogiri). Without seeing the way they're mounted, or even which side of the nakago the mei is on, it's not easy to say what the "type" of swords are... but most likely from looking at them, they're a katana variant. The amount of rust is typically an indication of age, so shouldn't be cleaned off... the last image is either a much newer blade, or it's been (foolishly) cleaned at some point recently.
For anything more than that, including their categorisation, we'd need a fair bit more information.