Yasmin 1 This earthing mat might work well in other countries where you can actually ground it. However, the common Japanese home does NOT have the electrical outlets to make these mats effective or useful. I contacted the seller to find out if there is any adapter or solution to adapt these mats to the electrical outlets in Japan; seller never replied to my email. I tested all the outlets in my home; only one outlet in the kitchen and one in the laundry/bathroom were grounded. Not the places where I can use these mats. If you cannot connect them to a grounding outlet, there is no reason to sell or buy these mats.