The technological expertise behind the new world record
After World War II, Japan experienced a high-growth era of skyscraper construction. It was at the same time that elevator speeds began to accommodate the higher buildings by increasing its speed capacity. In fact, this is not the first time Mitsubishi Electric has broken speed records. It was done twice more, in 1974 with the Shinjuku Sumitomo Building (540m/m), and in 1977 with the Sunshine 60 Building (600m/m). The world records were gained through the continuing efforts and accumulation of technological expertise. In other words, these records were generated by steady technological advances, not sudden technological innovations.