The Locked Room

Kagi no Kakatta Heya is a 2012 Japanese Getsuku television drama series distributed by Universal Pictures under the locked-room mystery genre broadcast by Fuji Television from April 16 to June 25, 2012. It is based on the Kei Enomoto novel series by Yusuke Kishi titled The Glass Hammer (硝子のハンマー), The House of Will-o'-the-Wisp (狐火の家), and The Locked Room Murders (鍵のかかった部屋). The drama stars Satoshi Ohno, Erika Toda, and Koichi Sato, and received a viewership rating of 16.0% on average. A drama special was later aired on January 3, 2014, which received a viewership rating of 15.9%.