What's New

In light of the fire incident that occurred in a toilet in the Green World (GW) construction zone on 28 March 2024 and other incidents, the Japan Association for the 2025 World Exposition (hereinafter referred to as “the Association”) has consulted with experts to compile safety measures for methane gas and other substances during the period of Expo 2025 Osaka, Kansai, Japan (hereinafter referred to as “the Expo”) and published them on 24 June.

The Association plans to publish the results of gas concentration measurements during the construction of the venue on a regular basis. The results of gas concentration measurements for July and August 2024 have now been compiled.

Regarding safety measures during construction and during the Expo, as already announced, in the GW construction zone, gas concentrations are measured before all work is carried out, and if concentrations are found to be above the standard values, mechanical ventilation is provided by fans, etc., and work is only started after it is confirmed that concentrations are below the standard values.

Please note that the measurement results are before the implementation of the measures to be taken during the Expo (announced on 24 June). Moving forward, measures will be taken during the Expo period to ensure the safety of visitors and others by preventing gas ingress, appropriate ventilation of any ingress gases, continuous measurement of gas concentrations, and early detection of any gas build-up.
・Overview of gas detection in buildings at the Expo site (July and August 2024)

■ For further information, please see the following attachments:
　・Results of gas concentration measurements (in buildings) (July) [Tables 1-11].
　・Results of gas concentration measurements (outside buildings underground telecommunications equipment pits) (July) [Tables 12-13].

　・Results of gas concentration measurements (in buildings) (August) [Tables 1-11].
　・Results of gas concentration measurements (outside buildings underground telecommunications equipment pits) (August) [Tables 12-13].

■ （Reference materials）
Results of gas concentration measurements (gas vent pipes) (July 2024 – August 2024)