I'm currently fighting Genichiro. Mostly he is pretty easy, but somehow my counter to his jump attack-perilous attack combo only works two out of three times. Apparently he has different perilous attacks, but it's impossible to see what he's doing while he's in the air. His black cloak also does a really good job of making it hard to see which perilous attack he is charging up on the ground. So it basically comes down to luck.