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. 2022 Feb 23;12:3063. doi: 10.1038/s41598-022-06716-4

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The ratio of the population at 12 sites and the period of emergency declaration. The ratio of the population to 30 April 2020 at 12 sites (i.e. Tokyo station, Otemachi, Marunouchi, Tokyo station south, Kasumigaseki, Ginza, Shinjuku Station, Shibuya Center Street, Shinagawa Station, Haneda Airport Terminal 1, Haneda Airport Terminal 2, and Tachikawa station) is shown. Raw data are shown in (A), and only the trend components are shown in (B). The periods of the emergency declaration are shown in pink.