ha, noooo.. Since HSJ is a huge group, they are divided into 2 groups. Hey! Say! 7 is a division/ unit of Hey! Say! JUMP, which is composed of the younger members. The other is Hey! Say! BEST composed of the older members.
yah it can get confusing with the units. HS7 & HSB gets to have their own group songs as well, but that's just included within singles/ albums/ concert performances of Hey! Say! JUMP..
yeah, although that's not a very good link to show off Yuto's mad drum skills. He's like CRAZY good. He wrote Dash!! and was purposely composed to show off his drum skills.
what do you mean? It's their own kind of sub-unit called JUMP Band. They perform on concerts w/ that arrangement: Yuto on the drums, Keito and Yabu on guitar, Hikaru on bass, Inoo on keyboard, and usually Takaki on vocals. But on their own group songs, they get the other members involved in the singing.
But on their own group songs, they get the other members involved in the singing. This is what I mean. Don't sound angry, I only talked to you about my opinion. ^^