Office buildings

Eitai Dia Building

  • The robust anti-seismic performance of building, undergoned “High-rise building structure assessment”.
  • The ceiling height is approximately 4,000mm above a 400mm raised floor on the 11th, 12th and 13th floors.
  • The ceiling height is approximately 2,800mm above a 300mm raised floor on the 2nd to 10th floors.
  • Emergency power generators supply power to all facilities including air-conditioners and lighting, in building tenant premises.
  • Each floor has a lounge
  • The building has an underground parking space.
  • Uses RE100-compliant electricity.


14-5, Eitai, Koto-ku, Tokyo


September 1991

Structure and scale

Steel reinforced concrete, Above ground: 13 floors, Underground : 1 floor

Total floor area

29,851.31 m2

Leasable floor area

Approx. 1,540 m2 - approx. 1,740m2

Floor load bearing

1st floor: 300 kg/m2
2nd - 10th floors: 600 kg/m2
11th - 13th floors: 500 kg/m2

Ceiling height

1st floor: 2,700 mm + 300 mm (raised floor for office use)
2nd-10th floor: 2,800 mm + 300 mm (raised floor for office use)
11th-13th floor: 4,000 mm + 400 mm (raised floor for office use)


Individual system

Parking lot


8-minute walk from Monzen-nakacho Station, Tokyo Metro subway
10-minute walk from Suitengumae Station, Tokyo Metro subway