The data are organized by price. For less than ¥1,000 per month, you’ll get the low-speed, no streaming data SIMs that are good only for short messaging and light maps usage. Many of these have a coupon option that lets you add several hundred megabytes of usually unrestricted data (e.g., JCI’s turbo charge).
Spending over ¥1,000 per month will get you about 1GB of data, though it will typically be relatively high-latency and will not perform as well as ¥6,000 Docomo data plan. Multiple gigabytes can be had for over ¥2,500.
Plans have been reviewed for: Asahi Net, BB.excite, BIGLOBE, docomo, DTI, Fusion, hi-ho, IIJmio, Inter Communications, JCI, Mobile Renaissance, OCN, Panasonic, plala, So-net, TikiTiki, Toppa!, Wireless Gate
An English version, can be downloaded Japan MVNO plans (2013-04-01)
see source link via Comparison of all Japanese MVNOs
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