Don't Toss Japan!
Too funny. The upper box basically says, "Toss cigarette and you toss Japan!" Which just might work since Japanese are supposedly big on national pride.
The bottom part is just...ha. This takes the phrase "I fart in your general direction" to a whole new meaning. ^_^
Oh, Now I know Japan not just for their crazy games (Dance, Dance Revolution, Chu Chu Rocket, Super Monkey Ball, Pokemon, Seaman, Ecco the Dolphin, Animal Crossing, and Katamari Demacy) but also for unconventional billboards.