Vocabulary consisting only from characters you are able to read
忍者
にんじゃ
ninja (persons in feudal Japan who used ninjutsu for the purposes of espionage, assassination, sabotage, etc.)sensou, shigoto
次々に
つぎつぎに
one by one, one after another, successivelyjlpt3
石器
せっき
stone implementmix
元
もと
původ, zdroj, počátekleda1
歯石
しせき
dental calculus (calcified deposits that accumulate on the teeth), tartar (of the teeth)mix