Ryōunkaku Ryōunkaku The was Japan's first western-style skyscraper. It stood in the Asakusa district of City of Tokyo (now Taitō, Tokyo) from 1890 until its demolition following the Great Kanto earthquake of 1923. The , as it was affectionately called by Tokyoites, was Tokyo's most popular attraction, and a showcase for new technologies. It housed Japan's first electric elevator. The Ryōunkaku quickly became a landmark and symbol of Asakusa after its opening in 1890. It was a major leisure complex for visitors from all over Tokyo. When the 1894 tremor weakened the structure, it was reinforced with steel girders. However, the
2011 Tōhoku earthquake and tsunami intensities were smaller than the actual ones in some places, especially in Kanto, Koshinetsu, and Northern Tōhoku regions where the populace warning did not trigger. According to the JMA , reasons for the underestimation include a saturated magnitude scale when using maximum amplitude as input, failure to fully take into account the area of the hypocenter, and the initial amplitude of the earthquake being less than that which would be predicted by an empirical relationship. There were also cases where large differences between estimated intensities by the Earthquake Early Warning system and the actual intensities occurred in the aftershocks and