The survey was conducted at medical facilities on one designated date set for each institution from three days in October.
The number of patients refers to those who were continuously receiving medical treatment (including those who did not receive medical treatment at medical institutions on the dates of the survey) calculated by the following formula:
number of patients receiving medical treatment = estimated number of inpatients + estimated number of initial visit outpatients + (estimated number of return visit outpatients × average interval since last visit × adjustment factor (6/7))
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Number of patients with uterine fibroid Japan 2020, by age
As of October 2020, there were approximately ** thousand patients aged 45 to 49 years in Japan receiving treatments for uterine myomas, also called uterine fibroids. That year, the total number of patients treated for uterine fibroids amounted to nearly *** thousand.
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MHLW (Japan). (June 30, 2022). Number of patients receiving treatments for uterine myoma in Japan in October 2020, by age (in 1,000s) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 01, 2026, from /statistics/1290792/japan-number-patients-uterine-fibroid-by-age/
MHLW (Japan). "Number of patients receiving treatments for uterine myoma in Japan in October 2020, by age (in 1,000s)." Chart. June 30, 2022. ÌÇÐÄÆƽâ°æ. Accessed August 01, 2026. /statistics/1290792/japan-number-patients-uterine-fibroid-by-age/
MHLW (Japan). (2022). Number of patients receiving treatments for uterine myoma in Japan in October 2020, by age (in 1,000s). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 01, 2026. /statistics/1290792/japan-number-patients-uterine-fibroid-by-age/
MHLW (Japan). "Number of Patients Receiving Treatments for Uterine Myoma in Japan in October 2020, by Age (in 1,000s)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Jun 2022, /statistics/1290792/japan-number-patients-uterine-fibroid-by-age/
MHLW (Japan), Number of patients receiving treatments for uterine myoma in Japan in October 2020, by age (in 1,000s) ÌÇÐÄÆƽâ°æ, /statistics/1290792/japan-number-patients-uterine-fibroid-by-age/ (last visited August 01, 2026)
Number of patients receiving treatments for uterine myoma in Japan in October 2020, by age (in 1,000s) [Graph], MHLW (Japan), June 30, 2022. [Online]. Available: /statistics/1290792/japan-number-patients-uterine-fibroid-by-age/
