The cards, aptly named Prepaid SIM for Japan, can be purchased along with smartphones, mobile routers and smartphone accessories at the vending machines, the Tokyo-based telecommunications firm said.

The airport will have two such machines, for Terminal 1 and Terminal 2, with only credit cards accepted for added ease.

NTT Communications said the SIM cards are priced at ¥3,450 for one week and ¥4,950 for two weeks. Both types offer a maximum download speed of 150 megabytes per second and 50 Mbps as an upload speed. If the data amount exceeds 100 MB a day, the network speed will slow down.