My husband and I both thought this illustration looked a bit... peculiar. The man pictured on the canister is supposed to be enjoying a bit of roasted seaweed, but the way its in his mouth makes it look like he's trying to tear apart a particularly tough bit of beef jerky rather than savoring some seasoned seaweed paper. The look oin his eyes is one of concentration or surprise - perhaps a little of both.
While it could be that this is an original piece of art, after considering it for a bit, I wondered if this wasn't an old illustration that was edited to add in the nori and the hand. Perhaps he was originally a bit player in a tentacle porn print. I guess I'll never know.