Numata
Shinjuku: Izakaya
Numata (Shinjuku: Izakaya)
Numata
Open 5pm-midnight daily.
Sun: Open Sundays

Fans of gyumotsu nikomi can choose three different varieties of stew at this popular specialty izakaya. The soy sauce-based version probably best shows off the individual flavors of the various organ meats, while the miso and extra-spicy miso versions will satisfy those who like a richer, deeper sauce.

The very tender braised beef tongue is also highly recommended, and it's definitely worthwhile to explore the selection of charcoal-grilled beef, beef parts and vegetables. There are two or three premium sake that nicely complement the rich nikomi and charcoaly flavors. Budget around Y2500 for dinner with drinks.

Shinjuku
Shinjuku-ku, Shinjuku 3-6-3, 2F.
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Explore the hidden side of Tokyo dining
Charcoal-grilled pork on skewers, udon noodles in curry-flavored soup, octopus dumplings, deep-fried beef cutlet -- there's a whole world of exciting food in Tokyo that food-loving visitors often miss out on.

This book will introduce you to more than twenty of Japan's favorite specialty foods that are less well known abroad, along with a guide to the best places in Tokyo to try them and expert tips on what to order. From Bento.com.
 
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Venue listing from Bento.com5 Star Rating: highly recommended