(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
Distribution of medical errors reported to JQ Japan 2022, by injury degree
In 2022, approximately *** percent of medical errors led to deaths of patients, according to the reports submitted by medical facilities to the Japan Council for Quality Health Care (JQ). 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 27, 2023). Distribution of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan in 2022, by degree of injury [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 04, 2026, from /statistics/1114490/jq-distribution-medical-adverse-events-reported-medical-facilities-by-injury-degree/
Japan Council for Quality Health Care. "Distribution of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan in 2022, by degree of injury." Chart. March 27, 2023. ÌÇÐÄÆƽâ°æ. Accessed August 04, 2026. /statistics/1114490/jq-distribution-medical-adverse-events-reported-medical-facilities-by-injury-degree/
Japan Council for Quality Health Care. (2023). Distribution of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan in 2022, by degree of injury. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 04, 2026. /statistics/1114490/jq-distribution-medical-adverse-events-reported-medical-facilities-by-injury-degree/
Japan Council for Quality Health Care. "Distribution of Medical Errors Reported by Medical Facilities to Japan Council for Quality Health Care (Jq) in Japan in 2022, by Degree of Injury." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 27 Mar 2023, /statistics/1114490/jq-distribution-medical-adverse-events-reported-medical-facilities-by-injury-degree/
Japan Council for Quality Health Care, Distribution of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan in 2022, by degree of injury ÌÇÐÄÆƽâ°æ, /statistics/1114490/jq-distribution-medical-adverse-events-reported-medical-facilities-by-injury-degree/ (last visited August 04, 2026)
Distribution of medical errors reported by medical facilities to Japan Council for Quality Health Care (JQ) in Japan in 2022, by degree of injury [Graph], Japan Council for Quality Health Care, March 27, 2023. [Online]. Available: /statistics/1114490/jq-distribution-medical-adverse-events-reported-medical-facilities-by-injury-degree/
