The keyword refers to a highly specific and somewhat enigmatic intersection of Japanese media, audio engineering, and digital art. Most often associated with the phrase "Polyphonique Vision," this string appears to be a unique catalog identifier or a conceptual title for a project involving the legendary Japanese singer and songwriter Hiromi Sato .
The string of characters and numbers you provided——does not correspond to a widely recognized feature film, mainstream television show, or prominent public artwork.
For collectors, "X1X" codes are often associated with import listings (specifically from regions like Taiwan or Hong Kong distribution chains), but the figure itself is the standard Freeing Japanese release.