In Japan, there are lots of shops that sell prepaid SIM cards.
Among them, we picked up ones offering foreign language support.
They have a wide variety of prepaid SIM cards, and for buying the best one for your purpose,
they have "SIM Counter," which gives you an advice on it.
One of their largest stores is located in front of Akihabara Station.
Yodobashi Camera Multimedia Akiba Store
There are some shops and vending machines of prepaid SIM cards at airports in Narita, Haneda, Kansai, Chitose, and Naha.
|mineo||Prepaid SIM for Japan Travel||Store List|
|IIJ||Japan Travel SIM powered by IIJmio||Store List|
|eConnect Japan||Japan Prepaid SIM||WEB|
|b-mobile||VISITOR SIM||WEB||Store List|
|Sakura Mobile||Japan Prepaid Data Sim Card||WEB|
|So-net||Prepaid LTE SIM by So-net||Store List|
|U-mobile||U-mobile Prepaid||Store List|
|WirelessGate||Wirelessgate Prepaid SIM||Store List|
|Yokoso Japan||Yokoso Japan SIM||WEB||Store List|
|FREETEL||Prepaid Data SIM for Japan FREETEL SIM||Store List|
|NTT commnucation||Prepaid SIM for Japan||Store List|
|BIGLOBE||BIGLOBE NINJA SIM||WEB||Store List|
|Telecom Square||Wi-Ho! Prepaid SIM||WEB||Store List|
|TRAVELTECH SIM||TRAVELTECH SIM||WEB|