Sadly the store changed the promotion since the story hit the internets
Japanese Department Store May Want to Look Up the Word ‘Fucking’
"-There should be some cool English words on these signs.
-How about "Fuckin' Sale?"
-What's that mean?
-Fuckin' means, like, really good. So it's a really good sale.
-And there's no other meaning to "fuckin'? Nothing at all that might embarrass us on the internet? Remember what happened with our Save-a-Shit-Ton promotion…"