agent
art
asian
assassin
assassination
background
black
blade
caucasian
combat
costume
culture
dangerous
fighter
grey
hide
invisible
japanese
katana
killer
legendary
male
man
martial
mercenary
ninja
ninjato
ninjutsu
ninpo
oriental
people
person
professional
secret
shadow
shinobi
shinobinomono
skilled
spy
stealth
sword
thief
traditional
trained
warfare
warrior
weapon