AeriSIM offers unlimited data eSIM plans for Japan that are valid for 3, 5, 7 or 10 days. The plans provide a local IP address, allow tethering, and have a maximum speed of 10 Mbps, but a Fair Usage Policy may reduce speeds after heavy use. Prices range from $5.15 to $18.19 USD, and each plan is delivered over a 5G network in Japan. Travellers who need confirmation about speed throttling or the FUP threshold can contact AeriSIM for details.