#eSIM
2 guides about esim in Japan, newest first.
Your first three hours in Japan: airport to hotel
Immigration, customs, data, cash and the train into the city, in the order you will do them, for Narita, Haneda and Kansai.
eSIM, pocket Wi-Fi or SIM card: getting data in Japan
Which option suits solo travellers, couples and families, how to install an eSIM before you fly, and what to do if it does not connect.