Cigarette marketing in Japan is not yet subject to the same restrictions as, say, in the UK. So this new product uses the current associations with good, healthy things of the word "hybrid". Hybrid cars combine the electric and fuel, clearly. But a cigarette?! Turns out the pack is split between regular and menthol. Is this meant to suggest that you're doing yourself good by smoking menthols half the time? God knows. Just a big push to sell more cigarettes by the Pavlovian use of the word "hybrid".