Ikejime … is a method of killing fish that maintains the quality of its meat.

It involves the insertion of a spike quickly and directly into the hindbrain, usually located slightly behind and above the eye, thereby causing immediate brain death. After spiking the brain, a thin needle or piece of wire is inserted into the spinal column's neural canal to prevent any further muscle movement.

I read about it in a recent New Yorker short article: https://www.newyorker.com/magazine/2026/01/26/how-to-kill-a-...