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Ordinance on Industrial Safety and Health
Ministry of Labour Ordinance No. 32 of September 30, 1972

Latest Amendments:
Ministry of Health, Labour and Welfare Ordinance No. 47 of March 30, 2007
In Japanese

Update : 2008.03.28

Part III Health Standards

Chapter V Temperature and Humidity

Article 606 (Adjustment of Temperature and Humidity)
  • (1) The employer shall, as regards the indoor workshop having hot, cold or humid condition and where it is liable to be detrimental to health, take appropriate measure for adjustment of temperature and humidity such as air-conditioning, heating or ventilation.
Article 607 (Measurement of Atmospheric Temperature and Humidity)
  • (1) The employer shall, as regards an indoor workshop having hot, cold or humid conditions prescribed by Article 587, measure the atmospheric temperature, humidity and radiation heat in the said indoor workshop (for the radiation heat, limited to the indoor workshop set forth in item (i) to (viii) of the same Article), periodically once every period within half month.
  • (2) The provision of paragraph (2) of Article 590 shall apply mutatis mutandis to when measurements pursuant to the provision of preceding paragraph have been carried out..
Article 608 (Protection from Radiation Heat)
  • (1) The employer shall, in a case when an indoor workshop has facilities such as a blast furnace which generate a great deal of heat, etc., discharge the heated air directly to the open air or take measures to protect workers from the radiated heat.
Article 609 (Repair of Heated Furnace)
  • (1) The employer shall, in repairing a furnace being heated, not allow workers to enter the furnace until it has cooled off to a reasonable extent.
Article 610 (Humidification)
  • (1) The employer shall, when performing humidification due to the nature of the work, make within the extent that it is not harmful, and use that clean water for atomizing.
Article 611 (Atmospheric Temperature in a Pit)
  • (1) The employer shall maintain the atmospheric temperature inside a pit 37℃ or lower. However, this shall not apply to when having workers engage in lifesaving or danger prevention work with necessary measures to prevent health impairment due to the high temperature.
Article 612 (Measurement, etc., of Atmospheric Temperature in a Pit)
  • (1) The employer shall, as regards a workshop in pit set forth in item (ii) of Article 589, measure the atmospheric temperature, in the said workshop, periodically once every period within half month.
  • (2) The provision of paragraph (2) of Article 590 shall apply mutatis mutandis to when measurements pursuant to the provision of preceding paragraph have been carried out.
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