kakute
kakute is a ring or weapon.
Also recorded as tekagi-shuko.
Overview
Ninja spiked ring weapons.
In detail
kakute is a ring or weapon.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Kakute”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2655317: kakute
Consult the source