noun
many paper cranes; a string of 1000 paper cranes
Refers to a large number of origami cranes, traditionally 1000, often strung together as a symbol of peace, healing, or good luck.
病気の友達のために千羽鶴を折った。
I folded a thousand paper cranes for my sick friend.
折り鶴 is a single folded paper crane, while 千羽鶴 refers to many cranes, especially a set of 1000.
Compound of 千 (sen, 'thousand'), 羽 (wa, counter for birds), and 鶴 (tsuru, 'crane'), with rendaku voicing. The tradition of folding 1000 cranes for wishes or recovery became widely known through the story of Sadako Sasaki.