Ippudo: 65 Fourth Ave between 9th and 10th Sts (212-388-0088)
Hide-Chan: 248 E 52nd St between Second and Third Aves, second floor (212-813-1800)
Kambi: 351 E 14th St between First and Second Aves (212-228-1366)
Menchanko Tei: 131 E 45th St between Lexington and Third Aves (212-986-6805)
*Please note that most of these locations are "cash only" so make sure to stop by the ATM before planning a visit! Also, most of these shops are very small and typically have a wait to be seated, so don't come starving as you will most likely be standing around for about 20-45 mins.