Internet in Japan… this was a subject that took me some time and research to figure out how to get it.
There are several wells to have access to the Internet in Japan. Although pocket wi-fi is available it only worth it if you want to continue to use the SIM card from your country but have the inconvenience of being another device to carry.
The simplest thing is to buy a Japanese SIM card and you don’t have to book or buy anything in advance or use one of the many services available on-line. You can do it at your arrival, easily at the airport.
At Narita Airport, there are several options. Just outside the arrivals terminal is an information desk that tells you where to buy the SIM card as well as where to withdraw money from the ATMs.
Going downstairs, on the way to the Keisei Skyliner train that connects the airport with the city of Tokyo, you will find several counters selling both SIM cards as well as cell phones and Pocket wi-fi (the latter are for rent). Also here you’ll find an ATM from SevenBank (from SevenElevan).
Several options are depending on the number of days (one week, 15 days or one month) with only Internet data or also with the possibility of phone calls.
I bought my SIM card on SevenElevan (a supermarket located next to these counters) for 4950 yen, valid for 30 days with 10GB, mobile data only.
To activate the service you don’t need anything!!! Just change the SIM cards and you have the Internet active immediately. It couldn’t be easier!!!
It should be noted that in Japan there are many places with wi-fi, it is not uncommon to find free wi-fi in restaurants, cafes, temples, department stores, airport, subway, train stations and even on trains (Shinkansen and Keisei, for example); there are still some wi-fi spots on the streets of some of the cities … not very fast but it helps to navigate on maps and communicate by text.