sashimi knife; long thin-bladed knife
A specialized knife with a long, thin, flexible blade used primarily for slicing sashimi, especially octopus (蛸), hence the name.
The chef sliced the sashimi beautifully with a sashimi knife.
Because the sashimi knife has a thin, long blade, it can create delicate cuts.
Compound of 蛸 (tako, 'octopus') and 引き (hiki, 'pulling' or 'drawing'), from the knife's original use in slicing octopus for sashimi.