Imported Japanese Beer From Canada!?! WTF...

Sigh.  I see the lovely Japanese lager Sapporo on sale in Tesco with the glorious words on the front "Imported".  Wonderful, so happy!  Then I look at the back (because I'm a curious monkie [sic]) and I see that it's brewed in Canada.  Why?!  Sad face. [Side note: This was first published on Google+ ... are you on there?]