While this snack shop is a bit far from Iidabashi Station, Onoya Beef is near to Kagurazaka Station of the underground, Tosai Line.
Some meat shops sell snacks such as croquettes and deep-fried food in Japan. Of course, you can find a meat shop selling snacks in Kagurazaka.
The sign says the price of the food. From top to the bottom, a fried beef meat cake is 260 yen(US$2.5) and fried pork meat cake is 180 yen(US$1.7
As for the cooking recipe of deep-fried food, please take a look at this page.