The following data from Tokyo Kantei shows the change in apartment prices along the Chiyoda Subway Line. The first half this subway line runs through several high-end residential neighbourhoods in central Tokyo, before making its way north and terminating at Kita-Ayase in Adachi Ward.
Also, the line feeds into other lines including the JR Joban Line and Odakyu Odawara Line, and is one of the most used subway lines in Tokyo. Ayase Station, for instance, is the second most used station on the Metro with an average of 437,000 daily passengers changing trains, while Yoyogi Uehara has 250,000 daily passengers.
Otemachi, Nijubashi-mae, Hibiya, Kasumigaseki, and Kokkaigijido-mae Stations have been left out of the data. These stations are in the political and corporate headquarter districts of Tokyo and have very few residential properties.
The average price across all stations on the Chiyoda Line was 891,000 Yen/sqm in 2015, up 32.1% from 2014. The average building age was 20.5 years, down from 21.7 years in 2014. The average apartment size was 59.88 sqm (644 sq.ft), down from 63.08 sqm in 2014.