ESIM.DOG offers a range of eSIM plans for Japan that provide truly unlimited data. These plans come in different validity periods, from one day up to thirty days, and are priced between roughly $1.48 and $18.23 USD depending on the duration and the specific coverage route. Every plan uses 5G networks and includes tethering; the maximum advertised speed varies by plan, generally ranging from 128 kbps to 1 Mbps, and the service may throttle speed at high traffic volumes according to a fair‑use policy. Because the data allowance is unlimited, there is no need to worry about running out of a fixed data cap during the validity period, but users should be aware that peak‑time or heavy‑usage scenarios can trigger reduced speeds after the FUP threshold is reached. For precise speed limits and any further details, it is recommended to check the plan’s terms directly with ESIM.DOG.