| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | List of tallest structures in Tokyo - Timeline of tallest buildings |  |  |  |  |  |
| 3 | Name | Years as tallest | Height m (ft) | Floors | Ward | Notes |
| 4 | Ryōunkaku | 1890–1923 | 69 (225) | 12 | Taitō | - |
| 5 | Old Marunouchi Building | 1923–1936 | 33 (109) | 8 | Chiyoda | - |
| 6 | National Diet Building | 1936–1964 | 65 (215) | 9 | Chiyoda | - |
| 7 | Hotel New Otani Tokyo | 1964–1968 | 72 (237) | 17 | Chiyoda | - |
| 8 | Kasumigaseki Building | 1968–1970 | 156 (512) | 36 | Chiyoda | - |
| 9 | World Trade Center Building | 1970–1971 | 163 (533) | 40 | Minato | - |
| 10 | Keio Plaza Hotel North Tower | 1971–1974 | 180 (589) | 47 | Shinjuku | - |
| 11 | Shinjuku Sumitomo Building | 1974–1974 | 210 (690) | 52 | Shinjuku | - |
| 12 | Shinjuku Mitsui Building | 1974–1978 | 225 (738) | 55 | Shinjuku | - |
| 13 | Sunshine 60 | 1978–1991 | 240 (787) | 60 | Toshima | - |
| 14 | Tokyo Metropolitan Government Building No. 1 | 1991–2007 | 243 (799) | 48 | Shinjuku | - |
| 15 | Midtown Tower | 2007–2014 | 248 (813) | 54 | Minato | - |
| 16 | Toranomon Hills | 2014–present | 256 (838) | 52 | Minato | - |

Question: What is the change of the tallest building in 1974?
Answer: The Keio Plaza Hotel tower was the tallest building until 1974, when it was surpassed by the Shinjuku Sumitomo Building.