Spectral study of COVID-19 pandemic in Japan: The dependence of spectral gradient on the population size of the community

• Ayako Sumi ,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: sumi@sapmed.ac.jp

  Affiliation Division of Physics, Department of Liberal Arts and Sciences, Center for Medical Education, Sapporo Medical University, Sapporo, Hokkaido, Japan

  https://orcid.org/0000-0002-5347-650X

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• Masayuki Koyama,

  Roles Conceptualization, Funding acquisition, Investigation, Project administration, Validation, Writing – review & editing

  Affiliations Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan, Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan

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• Manato Katagiri,

  Roles Data curation, Formal analysis, Visualization

  Affiliations Division of Physics, Department of Liberal Arts and Sciences, Center for Medical Education, Sapporo Medical University, Sapporo, Hokkaido, Japan, Sapporo Medical University School of Medicine, Sapporo, Hokkaido, Japan

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• Norio Ohtomo

  Roles Conceptualization, Investigation, Methodology, Resources, Software, Writing – review & editing

  Affiliation Natural Energy Research Center Co., Ltd (NERC), Sapporo, Hokkaido, Japan

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