Japan: number of patients with dental caries by age

In 2020, around 2.9 million people in Japan were treated for dental caries. That year, the age group of five to nine years had the highest number of treated patients for tooth decay compared to other age cohorts.

Number of patients receiving treatments for dental caries in Japan in 2020, by age group (in 1,000s)

Characteristic	Number of patients in thousands
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Release date

June 2022

More information

Region

Japan

Survey time period

2020; as of October

Supplementary notes

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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