Scope of events reported as medical adverse event according to the source:
(1) Apparent errors in treatment or management that resulted in the patient’s death or mental or physical disability, or required unexpected treatment, treatment to an unexpected extent, or other medical procedure.
(2) Unapparent errors in treatment or management that resulted in the patient’s death or mental or physical disability, or required unexpected treatment, treatment to an unexpected extent, or other medical procedure (including events possibly associated with treatment or management provided; limited to unexpected events).
(3) Other than those described in (1) and (2), information conducive to the prevention of medical adverse events and their recurrence at medical institutions.
Citation formats
Number of medical errors reported to JQ Japan 2014-2023, by report type
In 2023, a total of **** thousand medical errors were reported to the Japan Council for Quality Health Care (JQ). Approximately **** thousand cases of which were submitted by medical facilities that were registered in JQ's database and subject to reporting requirements. About *** cases were from medical facilities which voluntarily submitted the reports. Designated by the health ministry in the country, JQ conducts various third-party evaluations of healthcare institutions and provides a database of medical adverse events and near-miss events with the aim of improving the healthcare system in Japan.
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Japan Council for Quality Health Care. (March 31, 2024). Number of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan from 2014 to 2023, by report type [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 22, 2026, from /statistics/1114335/jq-reported-medical-adverse-events/
Japan Council for Quality Health Care. "Number of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan from 2014 to 2023, by report type." Chart. March 31, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 22, 2026. /statistics/1114335/jq-reported-medical-adverse-events/
Japan Council for Quality Health Care. (2024). Number of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan from 2014 to 2023, by report type. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 22, 2026. /statistics/1114335/jq-reported-medical-adverse-events/
Japan Council for Quality Health Care. "Number of Medical Errors Reported by Medical Facilities to Japan Council for Quality Health Care (Jq) in Japan from 2014 to 2023, by Report Type." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 31 Mar 2024, /statistics/1114335/jq-reported-medical-adverse-events/
Japan Council for Quality Health Care, Number of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan from 2014 to 2023, by report type ÌÇÐÄÆƽâ°æ, /statistics/1114335/jq-reported-medical-adverse-events/ (last visited July 22, 2026)
Number of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan from 2014 to 2023, by report type [Graph], Japan Council for Quality Health Care, March 31, 2024. [Online]. Available: /statistics/1114335/jq-reported-medical-adverse-events/
