I am a Blackberry 8700 user in the Netherlands, but receiving JAPANESE characters as well.
Since I did not have any problem with receiving the Japanese characters I persuaded my Japanese colleagues to switch their mobile phones in a Blackberry
We obtained from our Polish provider (ERA) the Blackberry 8310 Curve !
Since it is not standard to receive the Japanese (or Chinese characters) I tried to find solutions to install the proper software. Via the forum I could get the 8310EastAsia_PB4.5.0._rel109_PL2.7.0.78_A_4.5.0.81 software which should provide this facility.
Unfortunately  No success!
Is there any possibility to obtain the correct software? I do not want to have the full OS in Japanese (should be in English) but be able to receive the e-mails with Japanese characters (instead of small black boxes).
I am starting to doubt if the 8310 any how will be abale to use these Japanese characters. I am getting to be felt tricked by the salesmen.

By the rest of the OS created by the above mentioned software is quit interesting.