Inexpensive and filling -- plus the food is pretty good; always crowded; reservations are required (and tables must be vacated within 90 minutes).
Address:
2-6-10 Takadanobaba
Shinjuku-ku
Tokyo Japan
Phone: 3200-6571
Open: Mon - Sat, 11:30 a.m. - 1:30 p.m. and 6 - 9 p.m.; closed Sun