The following paper presents the results obtained during the analyses of th
e street structure of Tokyo, focusing on six districts: Shinjuku, Shibuya,
Ikebukuro, Ueno, Nakano and Aoto. The length-area relation in the chosen zo
nes shows the presence of the analogue of a fractal dimension. The fractal
dimension appears in these high-density street zones branching within a lim
ited territory.