Home Albums YouTubeテーマソング YouTubeテーマソング (8 years) album Release day: Thursday, August 13, 2015 YouTubeテーマソング 8 years old Artists Seikin Hikakin Name Seikin When album released, He was 28, now 36 years old Hikakin When album released, He was 26, now 35 years old # Song Play