There's Martial Arts strike i've seen on film.
It looks almost like forward punch to those who can't see better.
To a more practiced eye for Martial Arts, it's clearly different.
Without weapon it can be seen as punch on different trajectory than standard Seiken-Tsuki Jodan.
With a Knife it can extend to a slice instead of a punch, hence the name i gave it, inspired by film & insight.
Related move with a knife would be 'Up-down chop' at the neck area.