The Century Tower is a 21-storey building located in Hongo, Bunkyo, Tokyo.

The building overlooks the River Kanda, with Ochanomizu on the opposite side.

This design nearly failed to gain authorisation from the Ministry of Health and Welfare due to Japan's stricter fire safety regulations.

However, Obayashi Corporation brought Foster's pan to life by pressurising the air throughout the atrium.

[3] During the Lost Decades, the original owner faced financial difficulties and sold the building.