Ramen noodle is definitely a very popular food here in Japan, it's also a staple food for the Japanese. Every corner of the road in Tokyo, you'll find a Ramen stall or restaurant. The one that I visited is located at Ikebukuro, at a small alley next to the Seibu Department store.
The advantage of this system is that, there won't be throat cutting/foreigner prices. Because the prices are listed and we paid for what we order.
The disadvantage is that, in some area or some restaurant, they don't have the menu in English. Hence the tourist have no idea what to order.
Last but not least, there's no trip to Japan is complete without a bowl of Ramen Noodles.