Not sure, but could they be pencil boards? I seen some for Boukenger, and they look similar in size, but again, not sure.
Yeah, I think your right cuz i remember the go-onger ones.
What do you do with them?
I read in a description on some site a while back that you put it under your paper and write on your paper.. so whatever you write doesn't have outline traces on the next pages of paper, LOL.