Juuzo's annoying as hell, but he can be handled.
Sneak round the left side, into the building, kill off the nerds in there before they can raise the alarm, then sneak through the rest of the building, hop out and quickly sneakmurder one of the shield guys, and you should be able to sprint over and get another quick kill before Juuzou & Friends come after you. Then it's a matter of taking down archer boy, then kill off his minions one by one, hopefully getting the second shield guy in the process (he can and will shove you at exactly the wrong moment if you don't), then run and get the old man waiting in the pond. The two of you can DP Juuzo, and from there you've got free rein!
...to go into the building and find the bloody door locked.
I'm gonna reiterate- I LOVE this combat system.
When you get into it with a strong enemy, and you learn their patterns, and you fall into the zone and get that rhythm going, just that ridiculous chain of strike strike deflect strike strike deflect deflect, it feels incredible. I just had a couple-minutes-long slugging match with some speedy bastard where I just refused to knock his posture all the way down to zero, because I was having so much fun just admiring how cool the characters looked in the middle of that.
I've just run into my typical Metroidvania hump, though, where I've got a handful of ways I think I can go, but on one there's a ridiculously tough enemy (holy shit that fuckin guy in the tower where they kept the kid, this dude is midboss material, what the hell am I doing here), on two others there are locked doors, one heads right down into the Tomb of Giants where there's no light and I really don't wanna go, and I've forgotten the other routes I can take.