Yeah, the main Avex building is in Tokyo, in South Aoyama. If you get off the JR Yamanote line at Harajuku, and walk straight down Omotesando Doori until the huge intersection at South Aoyama, cross the street, and turn left, you can't miss it. It's right next to a Choco-Cro, too!!

The inside looks a lot like the one in these pictures, though. There's a media room / reception office to the immediate right of the building, and it has very modern furniture and bright colors too.