I just realized that the gas does not smell the same in Japan and France (and probably elsewhere?), It disturbs me. I searched on the Internet the product name added to the Japanese gas, I have not found. If anyone has info ...
Edit (24/10/2011): In France, natural gas is made by adding odorant tetrahydrothiophene (THT) or mercaptan. In Japan, they use (tertiary-butyl mercaptan) TBM and the DMS (dimethyl sulfide). Geraldine thank you for the info ;-)
