Seven&i holdings is a giant of a company, and once you’ve registered, you can connect to the free-WiFi at affiliated companies such as Denny’s, the children’s clothes shop Akachanhonpo, and the super market Yorkmart. It seems convenient but it does have a limit. You can connect for 60 minutes in a single session, three times a day. This means you can use it for 3 hours in total in one day. If you had lunch at the diner, Denny’s, for a long time, it would be pretty convenient. But if you’re moving around the city, because you can only access three times a day you also can only login at a maximum of 3 spots in one day. On the other hand, 7-Eleven is very easy to find so we recommend registering before coming to Japan, just in case.