Overview of Overseas SIM Cards
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Conclusion
Buy Google FiPrevious companies, interviews and appearances related to oneself.icon but it can only be purchased in the U.S. In the end, if you're traveling around the world based in Japan and the U.S., you're likely to spend about $100 a month on communication costs. If you don't go to Japan much or have a certain amount of local knowledge and can always secure Wi-Fi, you can use Google Fi's overseas mode to keep it under 50GB and get by with just one.
If you're living only in the U.S. (but you don't have SSN), For Japanese residents living in the U.S. without an SSN, there should be few options other than T-Mobile Prepaid. This is $50 and cannot be used in the U.S. (only in Mexico and Canada).
Comparison for Japanese people
Ahamo is 3,000 yen for 20GB in Japan. Up to 20GB is free overseas. It will be forced to slow down for more than 15 days.
Rakuten Mobile has unlimited data for 3,000 yen a month with its own base stations in Japan. Overseas, you can charge 1GB for 500 yen with 2GB free. Google Fi can only be contracted in the U.S. (VPN is also impossible), but it is unlimited in the U.S. for $65. It can be used worldwide for up to 50GB. Things that have changed on a trip abroad after three years.
Don't stamp your passport.
Money is not exchanged (depending on the location), and all shopping is done with cards. VISA touch is mainstream and PIN usage is a minority.
Electric kick scooters are everywhere and are a means of transportation.
Google Maps was the strongest.
Oh, and.
Ahamo can be used for roaming without additional charges even when traveling abroad, and you don't need to rent Wi-Fi at the airport or buy a local eSIM. This was the most exciting thing this time. https://gyazo.com/d311119d5dedaae2be502c11dd78bb75
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Europe
20GB of monthly usable data without additional charges
Even if you have the "large serving" option, you can use up to 20GB of data per month while overseas.
If you exceed the available data usage for the current month, the communication speed will be limited to a maximum of 1Mbps during transmission and reception. As with domestic usage, the speed limit can be lifted by purchasing additional data. However, please note that if you have subscribed to the "Large Serving" option for overseas data communication usage during the month, the speed limit will not be lifted until the end of the month.