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Coronavirus Disease (COVID-19) Situation Report in Japan

Confirmed cases of COVID-19 in Japan. Data provided by the Ministry of Health, Labor and Welfare.

By Toyo Keizai Online covid-19 Task Team


JAPANESE

Nationwide Situation

Tested Positive


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TOTAL
Show Moving Average

Data source: MHLW Open Data. On and after 8 May, the data source was changed. See this link or notes below for further information. READ MORE

Active Cases


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TOTAL
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Data source: MHLW Open Data. On and after 8 May, the data source was changed. See this link or notes below for further information. READ MORE

Discharged


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TOTAL
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Data source: MHLW Open Data. On and after 22 April, cases which MHLW is still confirming reports from prefectures are included. On and after 8 May, the data source was changed. See this link or notes below for further information. READ MORE

Critically Ill


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Data source: "Coronavirus disease 2019 (COVID-19) situation within and outside the country" > "Critically ill" by MHLW. The former title was "Hospitalized with a ventilator or intensive care unit". See this link or notes below for further information. READ MORE

Deaths


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Data source: MHLW Open Data. On and after 22 April, cases which MHLW is still confirming reports from prefectures are included. On and after 8 May, the data source was changed. The number of deaths on June 19 includes the 13 patients who were PCR tested positive but died from diseases other than COVID-19 before that day in Saitama. See this link or notes below for further information. READ MORE

PCR Tested


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Data source: MHLW Open Data. On and after 3 March, tests for those who have been in close contact with infected person are included. On and after 29 September, the number does not have continuity with the past because Fukuoka started including tests by private facilities. See below for further information such as definition or notes.READ MORE

PCR Tests


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Data source: MHLW Open Data. On weekends and holidays, the number of PCR tests may be announced as "0" because MHLW did not receive the report, even if tests have been performed. The past data will be corrected if the number of previous tests was known. If not, the number of tests on weekdays and holidays will be added on the next weekday. The most recent few days may not be updated since dates containing "under investigation" items are not displayed. The dates are based on when the results of the tests were known. See below for further information such as definition or notes.READ MORE

Effective Reproduction Number


Formula: (New cases in past 7 days / New cases in 7 days before that) ^ (mean generation time / length of reporting interval). Mean generation time is supposed to be 5 days, and length of reporting interval is supposed to be 7 days. For the purpose of understanding current trends in real time, this formula is simplified and based on reporting dates. Note that this formula is a simplified version and may be affected by reporting delays. Model and supervised by Professor Hiroshi Nishiura of Hokkaido University Graduate School of Medicine. Refer to GitHub repository published by Prof. Nishiura for further details.READ MORE

Tested Positive By Age


"Unknown" includes undisclosed or under confirmation. "Discharged" is the number of people who are tested positive but not dead, critically ill, or hospitalized. The total number of this chart may not match the numbers of "Nationwide Situation" because only data that the MHLW obtained the details such as age group or hospitalization status is published here.READ MORE

Prefectures

Each Prefecture

Tested Positive in


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TOTAL
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The data is based on transcription of the prefectural disclosures by MHLW. In some prefectures, such as Tokyo, data is corrected from reports by each prefecture. See chart annotations in "Nationwide Situation" section or footer notes for further information such as definition or notes.READ MORE

Discharged in


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TOTAL
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The data is based on transcription of the prefectural disclosures by MHLW. In some prefectures, such as Tokyo, data is corrected from reports by each prefecture. See chart annotations in "Nationwide Situation" section or footer notes for further information such as definition or notes.READ MORE

Critically Ill in


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TOTAL
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The data is based on transcription of the prefectural disclosures by MHLW. In some prefectures, such as Tokyo, data is corrected from reports by each prefecture. Tokyo has changed the data definition on 27 April. See chart annotations in "Nationwide Situation" section or footer notes for further information such as definition or notes.READ MORE

Deaths in


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TOTAL
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The data is based on transcription of the prefectural disclosures by MHLW. In some prefectures, such as Tokyo, data is corrected from reports by each prefecture. The number of deaths on June 19 in Saitama includes the 13 patients who were PCR tested positive but died from diseases other than COVID-19 before that day. See chart annotations in "Nationwide Situation" section or footer notes for further information such as definition or notes.READ MORE

PCR Tested in


NEW
TOTAL
Show Moving Average

The data is based on transcription of the prefectural disclosures by MHLW. In some prefectures, such as Tokyo, data is corrected from reports by each prefecture. On weekends and holidays, the number of PCR tests may be announced as "0" because MHLW did not receive the report, even if tests have been performed. The past data will be corrected if the number of previous tests was known. If not, the number of tests on weekdays and holidays will be added on the next weekday. On and after 18 June in Hyogo, 21 June in Shizuoka, and 29 September in Fukuoka, the number includes tests covered by private testing facilities. The number in Tokyo includes medical insurance inspection results from 7 May, Antigen tested positive from 13 May, and Antigen tested negative from from 17 June. See Frequently Asked Questions for further information. Aichi in 3/16-22 excludes number of Nagoya city. Akita in 3/11 is the number of only Akita city. The figures for Chiba are only counted from 3/21, Osaka from 3/22. Data on and after 1 July in Kanagawa has been changed as the prefecture corrected the past data. See chart annotations in "Nationwide Situation" section or footer notes for further information such as definition or notes. READ MORE

Effective Reproduction Number in


In prefectures with fewer cases, a few case variations may bring a large fluctuation of effective reproduction number. In uncountable cases, such as zero new positives in the previous week, the number of effective reproduction number is also assumed to be zero. See chart annotations in "Nationwide Situation" section or footer notes for further information such as definition or notes. READ MORE