Office buildings

Tokyo Dia Building No.1-4

  • The high seismic performance and safety of the seismic isolation construction.
  • Reliable power supply equipment and large emergency power generators sources for 24/365 power supply.
  • Two layers of security at the building entrance and the office entrances.
  • Various convenient facilities for tenants, including dining halls, rental meeting rooms, and rental conference rooms, are available.
  • Uses RE100-compliant electricity.


1-28-24, 25, 38, Shinkawa, Chuo-ku, Tokyo


September 1973 - February 1985
(extended: December 2003, reopened after renovation: April 2005)

Structure and scale

Seismic isolation, Steel-reinforced concrete,
Above ground:11 floors, Undergound:1 floor

Total floor area

75,519.77 m2

Leasable floor area

249.95 m2 - 2,008.56 m2

Floor load bearing

500 kg/m2

Ceiling height

2,600 mm (+raised floor:200 mm)


Individual system

Parking lot

260, Underground parking garages (total for buildings No.1-5)


8-minute walk from Kayabacho Station, Tokyo Metro subway
5-minute walk from Exit B4 of Hatchobori Station, JR and Tokyo Metro Subway Line

Floor Plan