鎖 chain, irons, connection 18 strokes jōyō, taught in secondary school old JLPT 1 #1250 in newspapers Readings Onサ Kunくさり、とざ.す In Chinese 锁, traditional 鎖 Words written with it 閉鎖 へいさ closing N1 鎖 くさり chain N3 封鎖 ふうさ blockade N1 連鎖 れんさ chain 経済封鎖 けいざいふうさ economic blockade 鎖国 さこく national isolation 連鎖反応 れんさはんのう chain reaction 鎖骨 さこつ collarbone