Takoyaki (たこ焼き, lit. „grilled octopus“) are a popular kind of street food which you come across around nearly every corner in large Japanese cities, especially in the Kansai region (Ōsaka, Kyōto, …).
These came from the Tenjinbashi-suji in Ōsaka.
Edit: correct translation
While we’re being pedantic,
It doesn’t literally mean that, it’s more like “grilled octopus”.
You‘re both right! Thanks for pointing that out, edited post for correctness.