My must try food in Osaka are the Okonomiyaki and Takoyaki. There are plenty of takoyaki stands in Osaka. We passed by this one on Dotonburi. It was nice as they were cooking it outside and they had a sitting area inside.
Just in case you don’t know what a Takoyaki is. It’s a very popular Japanese snack. It’s made from batter, usually with minced/diced octopus. There are variations as well like cheese and bacon. It is usually served warm, drizzled in takoyaki sauce and mayonnaise with bonito flakes on top.