NTT Communications' prepaid SIM service, Prepaid SIM for Japan uses NTT Docomo's 4G/LTE and 3G networks, and gives users up to 100MB of high-speed data per a day for both 2 plans woth 7 and 14 usable periods. Each plan is available in 3 sizes (standard, micro, and nano).
Their prepaid SIM can be purchased via their website and they deliver it to hotels, post offices at major airports, or appointed places. Their prepaid SIM cads can also be purchased at Xcom Global counters at Haneda, Narita, Kansai, and Chubu Centrair airports as well as from a vending machine located inside the Narita Excel Hotel Tokyo or at Yodobashi Camera, a large shopping chain.
|*100MB/per day||778 Mbps||7 Days||¥3218||100MB||¥460|
|*100MB/per day||778 Mbps||14 Days||¥3780||100MB||¥270|
For a more information about NTT commnucation - Prepaid SIM Card Plans