Ryo (亮) (often written as Яyo), (born September 20, 1986) is a Japanese musician best known for his role as drummer and main songwriter of Girugamesh. He is the youngest of the four, and was recruited by Nii and ShuU as one of the original members of the band. He is also a significant composer of Girugamesh's songs.
- Name: Ryo (亮)
- Position in Band: Drummer
- Born: September 20th, 1986
- Horoscope: Virgo
- Zodiac: Tiger
- Blood Type: A
- Height: 163 cm (5'4")
- Weight: 50kg
- Hobbies: Remodelling bikes and touring
- Favorite Food: 'Jagariko, Tirolean Chocolate
- Disliked Food: Plum
- Quote: "Keep on supporting us please."
- Ryo composes a vast majority of the music for Girugamesh.
- Nii is his older brother
- Swearing is one of his bad habits.
- His idol and the person he wishes to meet the most is Yoshiki.
- He loves Stitch.
- He has dog, dachshund, named 'Chappie'