住友グループ
Construction began in November 1971 and was finished on March 6, 1974. At the time of its completion, its elevators were the fastest in the world at 540 meters per minute. It was the tallest building in Tokyo from March to September 1974 when it was surpassed by the Shinjuku Mitsui Building which is located just to the east of the Sumitomo building. It was developed by Sumitomo Realty &amp; Development, the real estate arm of the Sumitomo Group, and previously housed Sumitomo Realty's headquarters.