Gyunabe in Tokyo

Recently heard about a restaurant in Yokohama that serves gyunabe, which is like a really thick miso sukiyaki and looks absolutely delicious. I read about it here: http://ronomnom.wordpress.com/tag/gyunabe/ (not my blog) and it seems to imply that this is a unique dish to this restaurant.

Anyway, I'll be visiting Japan next year. Are there any restaurants closer to central Tokyo that serve this or should I just head out to Yokohama?

In gyunabe shop yokohama is famous Ota Nawanoren the best.
Arai-ya and Janome-ya also otherwise.
http://portal.nifty.com/kiji/140604164280_1.htm
Difference of sukiyaki and Gyunabe seems ,if not burned or first bake the meat.
Famous shop of sukiyaki of Tokyo, is the Ningyo-cho imahan.
http://www.imahan.com/index-e.html

here's a few
http://tabelog.com/tokyo/A1311/A131102/13003667/
http://tabelog.com/tokyo/A1301/A130103/13116064/
http://tabelog.com/tokyo/A1316/A131601/13160383/

Thank you for the suggestions, I'll look into those places.