Title: Shinshin chinka Kattoru = Cuttlefish [Cuttlefish] 新進珍菓カットルThis is via BibliOdyssey which has a big selection of Taishô Posters to peruse. It was a tossup between this and one with several Japanese maidens dreaming of a steamship.
Description: A cuttlefish. "Cuttle" or "Cuttle Fish" (a snack), Chishima-ya Shoten (千島屋商店).
Subject (Company): Snack foods
Let's face it, I'm a sucker for a cuttlefish. Isn't this little guy cute? And the way he's obligingly holding the product box up? Adorable?