"Ryoga's Theme" (凌牙のテーマ, Ryōga no Tēma) is an instrumental musical composition from the Japanese version of Yu-Gi-Oh! ZEXAL.
It is 1:24 long and has been released on Yu-Gi-Oh! ZEXAL Sound Duel 1. It is mostly used in connection with the character, Reginald Kastle, known as Ryoga Kamishiro in the Japanese version.