Yakisoba is Japanese fried noodles. Okinawa yakisoba is a little different then regular mainland Japanese yakisoba, though.
Typically the thicker noodles are used, and depending on the place it will be either salt style 塩 or sauce style ソース; there is also a ketchup-based style (gross) which luckily less common. Another difference is in the meats: usually spam is a popular choice, although often it will be a mix of spam and the same kind of pork they use in regular Okinawan soba. I do not eat meats so I give them to my husband or order without. It is commonly served with benishouga (red pickled ginger), which I love. Sometimes they even have the benishouga on the table so I can add as much as I like.
It is definitely junk food, and not so great for you, but with an ice cold Orion, it hits the spot. It is a popular choice with foreigners at the local shokudo 食堂 in Okinawa… after all what is not to like about fried noodles? Mainland Japanese yakisoba is sometimes topped with nori (dried seaweed flakes), mayonnaise, or katsuobushi (shaved bonito flakes) in addition to the benishouga, but this is much less common in Okinawa styles.