I'm under the impression that ProcessBook automation code (VBA) will handle Japanese characters if the local PC language/codepage is set to Japanese. This is mainly to support captions and text strings in symbols on PDI displays. Is this correct?
This is correct, you should have no problems if the local PC is set to Japanese as you mention. Because of some oddities in the way strings are converted from Unicode to non-Unicode, you will be safest if you also set your Regional Options on the Control Panel to use Japanese.