Yes, there are celebrities, expats, all the rich people living there.... the area is small ... behind Tokyu Department Store and near Shinsen Station on Keio-Inokashira Line. ( You can get off at Shibuya also, I just preferred this smaller station since it is more quiet with less people.)
Nice walk, if you would enjoy watching architectures.... there are also nice, cozy cafes, restaurants in this area.
I took Keio-Inokashira line to Shinsen Station and got off there. This photo is near Shinsen Station. Not Shoto area yet. ( Houses are smaller !!)