1. Ordinance on Prevention of Ionizing Radiation Hazard. Ordinance of the Ministry of Labour. No. 41. 1972.
2. International Commission on Radiological Protection (ICRP): The 2007 Recommendations of the International Commission on Radiological Protection. ICRP Publication 103. Ann. ICRP 37(2–4) (2008).
3. ICRP: Application of the Commission's Recommendations to the Protection of People Living in Long-term Contaminated Areas after a Nuclear Accident or a Radiation Emergency. ICRP Publication 111, Ann. ICRP 39(3) (2009).
4. Ordinance on Prevention of Ionizing Radiation Hazards at Work to Decontaminate Soil and Wastes Contaminated by Radioactive Materials Resulting from the Great East Japan Earthquake and Related Works. Ordinance of the Ministry of Health, Labour and Welfare. No. 152. 2011.
5. Establishment of New Regulations for Radiological Protection for Decontamination Work Involving Radioactive Fallout Emitted by the Fukushima Daiichi APP Accident