Hello,
Here are my guesses:
Kantei 1:
The long nagasa and the sugata point to a Shinshinto blade.
The the bizen style with the gunome and the kesho yasurime with deep angle lead me to think it has be done by Korekazu.
Kantei 2:
For this one, I also think it is a shinshinto blade, from the Hamabe school.
I think to Toshinori due to suguha hamon with nijuba and the shape of the boshi. The Kesho yasurime seems match the smith work.
Kantei 3
Well, the harder one due to the missing oshigata.
Even if blade has been suriage, the sugata lead me in koto nanbokucho.
First impression was a Nio blade, but I think that hada looks more a Yamato Tegai one so this is my guess
Sebastien