Things you can do when you have no gas are summarized together, so please check the link.
[If gas is stopped due to an earthquake]
If a large earthquake (shaking of intensity 5 or more on the Japanese scale) is detected, the gas meter will automatically stop the gas.
If none of your gas appliances can be used, please perform the restoration procedure. (The restoration procedure is the process of making the gas able to be used again.)
Please check the link for the restoration procedure.