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 II Safety Standards
Chapter VI Prevention of Dangers in Excavating Work, etc.
Section 2 Construction Work of Tunnels, etc
Subsection 1-3 Prevention of Explosions, Fires, etc.
Article 389 (Prohibition against Carrying Ignitable Articles, etc.)
- (1) The employer shall, when it is found as a result of the measurement pursuant to the provision of Article 382-2 that flammable gas exists, exclude the case unavoidable due to the nature of the work, prohibit workers from carrying fire, matches, lighters or other ignitable articles into the inside of the tunnels, etc., and post a notice to that effect at a readily visible place near the entrance to the tunnels, etc.
Article 389-2 (Measures in the Case of Automatic Alarms Sound)
- (1) The employer shall establish measures in advance that the workers concerned should take to prevent an explosion or fire due to flammable gas when the automatic alarms set forth in Article 382-3 sound, and make the said measures known to the said workers.
Article 389-2-2 (Measures to Remove Gas, etc.)
- (1) The employer shall, in the case of excavating work of tunnels, etc., and when the flammable gases are liable to be generated, take measures to remove the gases by boring and other necessary measures to prevent the flammable gas from eruption in order to prevent explosion or fire due to the said flammable gas.
Article 389-3 (Measures to Prevent Fire in the Case of the Work of Gas Welding, etc.)
- (1) The employer shall, in the case of construction work of tunnels, etc., and when carrying out the work of welding, cutting or heating metals using the flammable gas and oxygen inside the tunnels, etc., take the following measures to prevent fire:
- (i) To remove rags, wood chips, paper scraps or other flammables substances that exist nearby, cover them with nonflammable substance or install partitions to prevent sparks arising associate with the said work from spatter.
- (ii) To have the leader set forth in Article 257 carry out the following matters in addition to matters set forth in each item of the same Article.
- (a) To make the location of fire extinguishing equipment and how to use it known to the worker engaging in the work.
- (b) To monitor the work and take necessary measure when having found any abnormalities.
- (c) To confirm that there is no danger to cause fire due to sparks, etc., after completed the work.
Article 389-4 (Person Charged with Fire Prevention)
- (1) The employer shall, in the case of construction work of tunnels, etc., as regards the places inside the tunnel, etc., where fire or arc is used (excluding places where the work set forth in the preceding Article is carried out), designate a person charged with fire prevention and have the said person carry out the following matters to prevent fire:
- (i) To monitor the conditions in which fire or arc is used and take necessary measures immediately when having found any abnormalities.
- (ii) To confirm that remaining fire has been properly extinguished.
Article 389-5 (Fire Extinguishing Equipment)
- (1) The employer shall, when carrying out the construction work of tunnels, etc., install the fire extinguishing equipment suited to the nature of a fire that may break out at the locations where fire or arc is used, or where a switch board, transformer or circuit breaker is installed, and make the location of the said fire extinguishing equipment and the method of use how to use it known to the workers concerned.
Article 389-6 (Construction Work of a Vertical Shaft)
- (1) The provisions of the preceding three Articles shall apply mutatis mutandis to the construction work of vertical shafts.
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