Shin no Ippu - "One side of the heart"
This is when one uses his swordsman spirit to send an image of fear into someones eyes, this may paralyze their lungs. They will die in 5 minutes unless the spell is broken. The only way to break it is with a strong swordsman spirit, like kenshin or aoshi, or if you kill the user.
Hyouki No Jutsu - "--"
This is a special variation usin the shin no ippu. You cast the shin no ippu into your sword as a mirror so it reflects onto yourself. Jinei sent an image of fear that would bring out his maximum potential. This made him very strong.