You can read the manual (in English) for this camera online, it is available at the following link:
https://support.panasonic.co.nz/docstore/NVGS120_GS200%20book.pdf PDF format, so you probably need Adobe Reader to read it.
It was not known to me the NV-GS200 is a multi-language camera and also in the manual it is not stated. You could try to default the settings (all the above):
menu , [initial] () >> [initial set] >> [yes]
Unfortunately it is not possible to post Japanese in this forum, but try Google Translate
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