Kumagai Gumi's First BCS Prize and Dedication of the Todofuken Kaikan

1960

1960 Kumagai Gumi's First BCS Prize and Dedication of the Todofuken Kaikan

Todofuken Kaikan

The construction site was in the Hirakawa-cho area of Tokyo's Chiyoda-ku, which was zoned as a residential area at the time. Because of the restrictions on construction area and height, a variety of measures were taken to utilize space more effectively, such as using box-shaped reinforcement.
Points at which beams and pillars crossed were given increased rigidity, and steel plates were produced at the site using arc welding, which was just catching on at the time. The elegant and stately building, infused with a variety of ingenuity, was awarded the BCS Prize, the highest honor in the construction industry.
In 1999, the building was converted to the high-rise it is today, with 16 floors above ground reaching to a height of 77.1 meters. Kumagai Gumi was involved in this work as well.