Ministry of Health, Labour and Welfare
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Ministry of Health, Labour and Welfare
Ministry of Health, Labour and Welfare

Regarding the displayed data

1. Types of data displayed

Trends in COVID-19 occurrence, etc.

2. Data sources and aggregation methods

  1. (1)Data regarding case characteristics based on the daily information presented on official government websites (prefectures, government-designated cities, and core cities) (case-based database of case characteristics)
  2. (2)Daily information regarding the testing and medical care provision situations published by prefectures (cumulative database of published data, by prefecture)
  3. (3)Information regarding cluster events (e.g., outbreaks), obtained from the media or other sources.

Based on data sources (1) to (3), only data from August 1, 2020 were presented until 20:00 hours on May 25, 2021; from 20:00 hours on May 25, 2021, however, data prior to August 1, 2020 are included in the data presented.
2 data for Iwate, Yamagata, Gunma, Shizuoka, Osaka, Tokushima, and Miyazaki prefectures have been updated based on HER-SYS data since February 16, 2021: Number of newly confirmed cases by sex and age (weekly) and Number of confirmed cases by sex and age (cumulative).
2 data for Tochigi, Nara, Kagawa, Kagoshima, and Okinawa prefectures have been updated based on HER-SYS data since March 16, 2021: Number of newly confirmed cases by sex and age (weekly) and Number of confirmed cases by sex and age (cumulative).
2 data for the other prefectures have been updated based on HER-SYS data since April 1, 2021: Number of newly confirmed cases by sex and age (weekly) and Number of confirmed cases by sex and age (cumulative).

3. Regarding the minimum number of cases required for publicly displayed data

For sex and age indicators, as a rule, "*" is displayed only for the category “1 to 4 cases”, for reasons of protecting patient information.
However, in situations where the number of cases indicated with "*" could be identified from other data presented, "*" is also used for categories other than “1 to 4 cases.”

4. Other remarks

  1. (1)Some jurisdictions do not publish the (cumulative) number of severe cases or deaths by gender and age due to the small number of cases.
  2. (2)As the total number of confirmed cases nationwide includes the 149 cruise ship-related cases, this total does not equal the sum of the confirmed cases by prefecture.
  3. (3)Graph is currently under preparation, as Tokyo uses its own data format. (The number of severe cases by gender and age is published in the daily press.)
    https://www.fukushihoken.metro.tokyo.lg.jp/hodo/saishin/hassei.html *Japanese website
  4. (4)Some text has been translated by DeepL.