Nihonia mirabilis, the remarkable turrid, is a species of sea snail, a marine gastropod mollusk in the family Cochlespiridae.

The long siphonal canal is straight and unnotched, showing primary and secondary spirals.

The axial sculpture shows many weak growth lines.

The body whorl contains twelve primary spiral cords and measures ⅔ of the total length of the shell.

The thin outer lip is arcuately produced.