Yoshu Shonin Akasaka

The Akasaka location of this Chinese-style ramen chain serves a wide variety of noodle mixtures, all relatively predictable but tasty nonetheless. Their seasonal specialities are always worth sampling, while the signature sour-and-spicy sura tanmen and sesame-flavoured tantanmen are recommended for rookies. You get a choice of either knife-cut or extra-thin noodles, and additional toppings are available as well. The shop stays open until 4am and attracts an, uh, interesting crowd during the early morning hours.