I'm gonna use my rough Google-translator-to-English skills to say that
On the media packaging itself, it lacks a note that the media is made in Japan. In other words, there is no country of origin listed--or if it IS listed, it is not made prominent. (I believe I remember "Made in Japan" being prominently featured on some media in the past; not sure if this applies to the situation at hand).
@Christine: the Japanese comes from the YSS page. I'm not sure how to describe it; I'm not sure if it's one person or multiple people working to keep the site up-to-date with all sorts of independent tests and such. But it falls into the category of a review site, and I refer to it frequently for little bits of information on various drives. The site typically exposes information that the average person wouldn't know otherwise.
But anyway, YSS makes note that this part of the labeling is missing. It's equivalent to someone here at Myce finding out that the packaging has changed and having others verify origin, etc by the necessary means.
On the page Dogway linked in post #2, just below the entry for that item with the note Dog mentioned in post #4, there is an entry for a Panasonic disc made in India that shows the sticker stating country of origin ("Indo", or ã‚¤ãƒ³ãƒ‰).