"The World of the Emperor's Key" (『皇の鍵』の世界) is an instrumental musical composition from the Japanese version of Yu-Gi-Oh! ZEXAL.
It is 1:38 long and has been released on Yu-Gi-Oh! ZEXAL Sound Duel 1.
"The World of the Emperor's Key" was played in the following episodes:
|This listing is currently incomplete.|