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
掲載日：2008.03.28
Part III Health Standards
Chapter I Harmful Working Environment
Article 576 (Removal of Causes of Harmfulness)
- (1) The employer shall, in a workshop where handling harmful substances, exuding gas, vapor or dust, workers are exposed to harmful light or ultrasonic waves, or sending noise or producing vibration, or is contaminated with pathogens, take necessary measures such as using of substitutes and improvement of working methods or machine, etc., to eliminate the causes of these harmful situations.
Article 577 (Control of Exuding of Gas, etc.)
- (1) The employer shall take necessary measures such as making emission sources airtight and installation of a local exhaust ventilation system or general ventilation system at an indoor workshop where exuding gas, vapor, or dust in order to keep the concentration of gas, vapor or dust in the air in the said indoor workshop below harmful levels.
Article 578 (Prohibition of Use of an Internal Combustion Engine)
- (1) The employer shall not use machines using internal combustion engines in pits, well curbs, caissons, tanks, hold and other places where natural ventilation is insufficient. However, this shall not apply to when ventilating the said places to prevent health impairment caused by the exhaust gas of the said internal combustion engine.
Article 579 (Disposal of Exhaust Gas)
- (1) The employer shall, as regards a local exhaust ventilation system and other facilities of which let out exhausted gas containing a harmful substance, install exhaust gas disposal device, such as absorption, combustion, dust collection and other effective method corresponding to the kind of the said harmful substance.
Article 580 (Disposal of Waste Fluid)
- (1) The employer shall, as regards waste fluid containing harmful substance, discharge them only after processing by neutralization, precipitation, filtration, or other effective method, corresponding to the kind of the said harmful substance.
Article 581 (Disposal of Pathogens)
- (1) The employer shall, as regards exhaust gas, waste fluids or other waste material contaminated with pathogens, discharge or discard them only after appropriate processing such as disinfecting and sterilization.
Article 582 (Prevention of Scattering of Dust)
- (1) The employer shall sprinkle water or take other necessary measures to prevent dust from being scattered at outdoor workshop or in a pit where a great deal of dust is scattered.
Article 583 (Standards of Concentration of Carbon Dioxide Gas in a Pit)
- (1) The employer shall ensure that the concentration of carbonic dioxide gas in the air is kept at 1.5% or less in workshop in pits. However, this shall not apply to lifesaving or danger prevention work using air respirators, oxygen respirators or hose masks.
Article 583-2 (Indication, etc., of the Place Sending Noise)
- (1) The employer shall, when having a worker engages in the work in an indoor workshop where sending extreme noise, take measures such as indicating this with a sign so that the workers will be readily aware that the said indoor workshop sending extreme noise.
Article 584 (Prevention of Noise Propagation)
- (1) The employer shall, in an indoor workshop sending extreme noise, take necessary measures of providing partition, etc., in order to prevent the noise from being propagated.
Article 585 (Prohibition of Entry, etc.)
- (1) The employer shall prohibit persons other than those concerned from entering the following places and so indicate by displaying a notice to that effect at a readily visible location:
- (i) Places where a large quantity of high-temperature substances is handled or the temperatures are extremely high.
- (ii) Places where a large quantity of low-temperature substances is handled or the temperatures are extremely low.
- (iii) Places exposed to harmful light or ultrasonic waves.
- (iv) Places where the concentration of the carbon dioxide gas is exceeding 1.5%, or that of oxygen is less than 18% or that of hydrogen sulfide exceeding 10 ppm.
- (v) Harmful places where gas, vapor or dust are exuded.
- (vi) Places where harmful substances are handled.
- (vii) Places deemed considerably contaminated with pathogens.
- (2) A worker shall not enter the place where it is prohibited from entering pursuant to the provision of the preceding paragraph without reason.
Article 586 (Indication, etc.)
- (1) The employer shall ensure that harmful substances, pathogens and substances contaminated with them are piled in a fixed place and display a notice to that effect at a readily visible location.
Article 587 (Workshop Subject to Carry Out Working Environment Measurement)
- (1) The indoor workshops having hot, cold or humid condition prescribed by the Ordinance of the Ministry of Health, Labour and Welfare set forth in item (ii) of Article 21 of the Order shall be as follows:
- (i) Indoor workshops where the work smelting or refining minerals or metals by blast furnaces, open-hearth furnaces, converters or electric furnaces, is carried out;
- (ii) Indoor workshops where the work melting ores, metals or glass by cupola, crucible or others is carried out;
- (iii) Indoor workshops where the work heating ores, metals or glass by annealing furnace, soaking furnace, quenching furnace, heating furnace, etc., is carried out;
- (iv) Indoor workshops where the work baking ceramic ware, bricks, etc., is carried out;
- (v) Indoor workshops where the work roasting or sintering ors is carried out;
- (vi) Indoor workshops where the work carrying, rolling, casting, hardening, drawing heated metals is carried out;
- (vii) Indoor workshops where the work carrying, casting molten metals is carried out;
- (viii) Indoor workshops where the work casting molten glass into glass products is carried out;
- (ix) Indoor workshops where the work vulcanizing rubber in a vulcanizing pan is carried out;
- (x) Indoor workshops where the work drying substances by a dryer using a heat source is carried out;
- (xi) Indoor workshops where the work handling a large quantity of liquid air, dry ice, etc., is carried out;
- (xii) Refrigerators, ice plants, ice storage facilities, freezing plants or others in which workers carrying out work;
- (xiii) Indoor workshops where the work dyeing using a dyeing bath, which uses a large quantity of vapor is carried out;
- (xiv) Indoor workshops where the work cleaning or plating metals or nonmetalsby using a large quantity of vapor;
- (xv) Humidifying indoor workshops where the work of cotton-spinning or cotton-weaving is carried out;
- (xvi) In addition to what is listed in the preceding each item, the indoor workshops provided by the Minister of Health, Labour and Welfare.
Article 588
- (1) The indoor workshops sending extreme noise prescribed by the Ordinance of the Ministry of Health, Labour and Welfare set forth in item (iii) of Article 21 of the Order shall be as follows:
- (i) Indoor workshops where the work handling riveting machines, chipping machines, molding machines or other machines or tools that are driven by compressed air is carried out;
- (ii) Indoor workshops where the work rolling, drawing out, strain correctingor plate bending metals by rolling mills, etc., (excluding strain correction and plate bending by hydraulic press and drawing out by dies) is carried out;
- (iii) Indoor workshops where the work forging or casting metals by power-driven hammers is carried out;
- (iv) Indoor workshops where the work polishing or sand-washing metallic products by tumblers is carried out;
- (v) Indoor workshops where the work cleaning drums by chains or other tools driven by power is carried out;
- (vi) Indoor workshops where the work peeling off the bark of wood by drum barkers is carried out;
- (vii) Indoor workshops where the work chipping by chippers is carried out;
- (viii) Indoor workshops where the work manufacturing paper by a multi-cylinder paper manufacturing machine is carried out;
- (ix) In addition to what is listed in the preceding each item, the indoor workshops provided by the Minister of Health, Labour and Welfare.
Article 589
- (1) The workshops in pits prescribed by the Ordinance of the Ministry of Health, Labour and Welfare set forth in item (iv) of Article 21 of the Order shall be as follows:
- (i) Workshops in pits where carbon dioxide gas stagnates or is liable to stagnate;
- (ii) Workshops in pits where atmospheric temperature exceeds or is liable to exceed 28℃;
- (iii) Workshops in pits provided with ventilation facilities.
Article 590 (Measurement, etc., of Noise Level)
- (1) The employer shall, as regards an indoor workshop sending extreme noise prescribed by Article 588, measure equivalent noise level, periodically once every period within six months.
- (2) The employer shall, when having carried out measurements pursuant to the provision of the preceding paragraph, record the following matters and preserve the record for three years:
- (i) The date of the measurements
- (ii) The method of the measurements
- (iii) The location where the measurements were performed
- (iv) The conditions under which the measurements were made
- (v) The results of the measurements
- (vi) The name of the person who has carried out the measurements
- (vii) When the remedies have been taken based on the results of the measurements, the outline of the remedies
Article 591 (Measurement, etc., of Noise Level)
- (1) The employer shall, when having altered the plant or facility or having changed work processes or work methods in an indoor workshop sending extreme noise prescribed by Article 588, measure the equivalent noise level without delay.
- (2) The provisions of paragraph (2) of the preceding Article shall apply mutatis mutandis to the case that the measurements pursuant to the provision of the preceding paragraph have been carried out.
Article 592 (Measurement, etc., of Concentration of Carbon Dioxide Gas in a Pit)
- (1) The employer shall, as regards a workshop in pit set forth in item (i) of Article 589, measure concentration of carbon dioxide gas, periodically once every period within a month.
- (2) The provisions of paragraph (2) of Article 590 shall apply mutatis mutandis to the case that measurements pursuant to the provision of the preceding paragraph have been carried out.
- Part III Health Standards
- << 目次へ戻る
- Chapter I
- Chapter I-II
- Chapter II
- Chapter III
- Chapter IV
- Chapter V
- Chapter VI
- Chapter VII
- Chapter VIII
- Chapter IX
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