Vixen is a Japanese company so if it is authentic it will be in
Japanese. It may say Bi-Ku-Se-N in Katakana (phonetic spelling) -
although their export models usually say "Vixen" in Romanji.
My recollection is that older Vixen stuff all says at least JAPAN on it
no matter how small the part - but things may have changed recently. I'm
pretty sure a lot of their stuff is now made in China.
If it is any other sort of dense looking Kanji then the scope is most
likely a Chinese copy. The eyepieces with it should be a very good clue.
From your description my money would be on a Chinese clone.
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Regards,
Martin Brown