Land-surface parameters are evaluated from the continuos tower measurements in densely built-up residential area in Tokyo (plane aspect ratio is 0.43, mean residential height is 7.3 m and the ratio of vegetated cover is less than 20 %). The following results will be presented in the conference. (1) The annual and diurnal changes of the radiation balance, energy balance and scalar fluxes (heat, moisture and CO₂), and (2) bulk land surface parameters such as roughness length for scalars, wetness index and albedo. The averaged momentum roughness length is 1.56(m), and the parameters kB^-1, the added resistance of a surface to heat and moisture transfer, are 8.0 and 20.5, respectively. The wetness index is changing between 0.2 to 0.05 in accordance with the non-rainfall duration. The averaged value of wetness is 0.1, which can produce large latent heat flux up to 200 (w/m²) in daytime. The potential contribution of urban materials to such a large evaporation potential is investigated, in terms of the urban geometry and the physical property of concrete based on the laboratory data.