Are Yonex strings "Made in Japan" really made in Japan?

Always wondered if the Yonex strings in the plastic packets with  MADE IN JAPAN stamp on them were really made in Japan?

Yonex string packet sold outside Japan

Pricing of the non-JP Yonex strings seem to be quite standard across the globe. However the JP string models made for their local market are always much (MUCH) more expensive eg atleast double the price!

The following are the true MADE IN JAPAN items meant for the local JP market. They always seem to be packaged in box-like containers rather than plastic. 

Various true badminton strings from Japan

If so, does it mean the Japanese consumers are being terribly overcharged for packing in a cardboard box, or, are the oversea(s) customers been sold products not MADE IN JAPAN - vs the stamp found on the packaging?

Searching the internet reveals no additional information regarding locations where Yonex manufacture strings. So much for transparency from Yonex . ..

On the other hand, Ashaway is proud to reveal they only manufacture strings at a single location in the US! Hats off to Ashaway