Key of Life (Japanese: 鍵泥棒のメソッド, Hepburn: Kagi Dorobō no Mesoddo, lit. "(The/A) Key Thief's Method") is a 2012 Japanese comedy film directed by Kenji Uchida. The film opened in Japan on September 15, 2012. The movie's theme song "Tenbyō no Shikumi" (点描のしくみ) was written and performed by Kazuya Yoshii. The movie was remade in Korean in 2016 as Luck Key.