JCI is moving towards "build to order" services with the release of their first LTE SIM card. The B-Mobile4G Chameleon SIM card uses Docomo's Xi network. It initially costs ¥5,800 for 21 days or 3000 MB, and micro and regular sizes are available. Along with an LTE mobile router, this will be available from 3/31.
Chameleon indicates that the SIM can be recharged as one of three different products each month - the build to order aspect. Depending on your needs, each subsequent charge can be for a different product. If you move outside of the still relatively limited LTE area, simply chose a different recharge option.
- 30-day U300 data-only SIM: ¥2480 (300 kbps; unlimited)
- 30-day high speed LTE: ¥5,400 (best effort 75 Mbps*; 5000 MB)
- 120-day Fair: ¥8,800 (best effort 75 Mbps*; 1000 MB)