here's more on what i found out. Of course the only wording besides "carre de chocolat venezuela bitter" is in Japanese so i can't read it.

but I managed to find this:

http://www.veryasia.com/160184.html

Morinaga Venezuela bitter

AND, i've managed to find a source for these not far from home here in TO.

Japantown grocery Markham Ontario(Steeles Avenue and Victoria Park Avenue-generally)