You may have had ramen from a Japanese restaurant in your home town, but you haven't had ramen until you try one in Japan. This dish is extremely popular, and has such a rich history, that you can find two museums dedicated it.
Ramen is a Japanese noodle dish that was originally introduced to Japan from China. Ramen is hugely popular in Japan, that it's a challenge to go through any major train station and not find a little ramen shop where you order via vending machine! It's a quick and easy meal that will rarely cost you more than a few hundred yen. All cities in Japan are littered with little ramen shops which are largely recognisable with having a large red lantern with ramen written in Japanese.