Originally Posted by
joelfreak
If you are going through HKG at all before JPN, get a 3HKG card with the global roaming. This allows UNLIMITED roaming in JPN on Docomo for 300HKD/day. I have used it multiple times, and it works perfectly...
That's USD ~40 per day. I wouldn't call that cheap. Softbank has the equivalent outside Japan for 2900 yen a day -- unlimited phone and data.
To understand the Bmobile card better: it is possible to activate with a landline but only works for 10 days?? But activate with a Japanese cell phone it works for an unlimited time period.