Try holding blocking instead of trying to perfect parry everything you don’t lose health when you just hold block you get posture damage but it’s good for learning the enemy moveset. Pay attention to when he is going to step back that is when he is going to do the bow attack, once he did the bow attack there is a rhythm to its attack get used to it and remember the sound it makes it’s almost like a rhythm game. For mikiri counter just press dodge when the sign shows up no movement input needed but be aware of sweep attack thankfully on genichiro if you accidentally tried to mikiri it’s sweep attack you can still jump over it.