Amazon.com: Nippon SIM for Japan 180days 30GB 4G-LTE Data (No Voice/SMS) 3-in-1 SIM Card (Docomo Network) Supports Tethering, Japan Local Support, No Activation No Contract 短期帰国・短期来日最適 メーカーサポートより安心 : Cell Phones & Accessories
The Best Prepaid Travel SIM Cards in Japan to Help You Stay Connected - Klook Travel Blog