[CaptainZapp]

I hope not to drag this conversation too much down the rabbit hole, but do you have any advise about what and where to get when it comes to a data SIM, which works on a GSM phone in Japan? Validity: ca. 1 month.

[tixocloud]

I used a pocket wifi from Sakura Mobile when I was Japan - https://www.sakuramobile.jp/

They delivered it to my hotel and it was easy to set things up.

[Pamar]

Basically the same (except I used Rentaphone, as mentioned above).