Jinenryu Iai Shihogiri 自然流 居合 四方切り

"Your sword should make a whisking or whipping sound at each cut. If it doesn't, then you are putting too much strength into your cut and not enough speed. If you can't hear this sound then you are not moving the sword fast enough to cut."
"This applies to all cuts including the first (when you draw the sword) and chiburi ."