XLS to CVS in japanese

[pgamba]

I need to save an excel file in CSV that contain japanese.
Two issues -
1 -When the length of the content of the cell is less than 256 character,
the japanese look like ??????
2 -When the length of the content of the cell is more than 256 character,
the japanese look like #####

So the result look like this:
UPDATE;1000;1;MST;Battery change||???????????
?????????;##########################

pretty ugly is'nt it ?

Help.... ppppplease.