You could find out suitable property through Apartments Tokyo.
Apartments Tokyo has showing high end property in a central Tokyo,
which are Minato, Shibuya, Meguro, Shinagawa, Chiyoda, Chuo, Koto and Setagaya area.
Azabu,Hiroo,Roppongi and Aoyama would be main target area,
and also Denenchofu, Setagaya area for quiet residential area would be good location.