In plain language
Japan's occupational radiation rule sets worker dose limits (50 mSv per year, 100 mSv per five years; lens 150 mSv per year in this version), pregnancy limits, dosimetry and record-keeping duties, and requires shielding for fluoroscopy work positions.
At a glance
- Type of study
- Regulation or standard
- Who was studied
- General population
- Where
- Japan
- Topics
- Regulation and policyDosimetry and monitoringEye lens and cataractsPregnancy and reproductive healthRoom shielding and protective devices
- Summary based on
- a web page
What it found
Effective dose limit for radiation workers is 100 mSv per five years and 50 mSv per year.
Key figures: 100 mSv per five years and 50 mSv per year
Eye lens equivalent dose limit is 150 mSv per year and skin limit 500 mSv per year (as stated in this version).
Key figures: 150 mSv per year (lens); 500 mSv per year (skin)
Pregnant workers are limited to 1 mSv internal effective dose and 2 mSv equivalent dose to the abdominal surface during pregnancy; other women of reproductive capacity to 5 mSv per three months.
Key figures: 1 mSv internal; 2 mSv abdomen surface; 5 mSv per three months
Employers must measure worker doses with dosimeters worn on the chest (or abdomen for women) plus the most exposed body region, and keep records for 30 years.
Key figures: 30 years
For fluoroscopy, employers must install equipment allowing workers to prevent or shield X-rays at the work position.
Limits to keep in mind
This is a legal text, not a study; the version shown (last amended 2015) may be superseded, and the page was cut off partway through the fluoroscopy provisions.
Related research summaries
- Accidents of occupational exposure to ionizing radiation in radiology departments: risks, prevention, and management (2026, Narrative review)
- Occupational Protection in Interventional Radiology. A Joint Guideline of the Cardiovascular and Interventional Radiological Society of Europe and the Society of Interventional Radiology (2026, Guideline or consensus statement)
- SCAI/ASE/HRS/SIR/SVS Expert Consensus Statement on Enhanced Radiation Protection: Time for Mandatory and Urgent Action (2026, Guideline or consensus statement)
- Radiation exposure in interventional cardiology: a narrative review of health effects and novel approaches to ensure radiation safety (2025, Narrative review)
- Radiation Protection in Interventional Radiology (2022, Narrative review)
How this summary was made
ORSIF prepared this summary with AI assistance from a web page of the paper. A program then checked that the passage supporting each finding appears word for word in that source. A person has not yet reviewed each summary, so read the original before relying on a number. ORSIF summarizes research and does not endorse any product or company. Report a problem with this summary.
Prepared November 3, 2026.