I was brought to Aji Ho by a Japanese friend and was instantly blown away by its size and scale. Most restaurants in Japan are pretty small, particularly in the Amerika Mura neighborhood that Aji Ho calls home. Aji Ho is visible from a block or two in every direction because of its huge red awning. And you'll know you're there from the smells wafting out of the streetside vendors hawking takoyaki and oden.
I'll let Wikipedia explain what oden is: "Oden (おでん) is a Japanese winter dish consisting of several ingredients such as boiled eggs, daikon, konjac, and processed fishcakes stewed in a light, soy-flavoured dashi broth. Ingredients vary according to region and between each household." It's usually served with a spot of spicy mustard for added flavor. If you're going to try oden in Osaka, Aji Ho is the place to do it.
ALSO RECOMMENDED: their extra-thin okonomiyaki (おこのみやき) and their unique takoyaki (たこやき), which comes served with an acidic sauce instead of slathered in barbecue sauce, mayonaise, bonito fish flakes, and scallion, as is customary elsewhere in Osaka.