Mori - JR Tokyo Station Yaesu basement Central Exit 1-minute walk
The food scene in Tokyo Station is something I recommend you checking out. Yes it can feel like a tourist trap, but it's one of those places you have to walk through at least once. We stayed in Ginza so walking to Tokyo Station only took about 15 minutes. What's great is how accessible it is to get from one destination to another. We had little hesitancies to go to different areas of the city because of that.
With plenty of food in Tokyo Station, I recommend going for what you really want to try or crave. It's also fun if you want to do a restaurant crawl down here and there's plenty of walking if you feel it's needed to digest. And... a Starbucks is also around for quick pick-me-ups.
I checked out Mori not because of the lines. Because there was none. But because I was craving beef tongue. And if you've ever had Japanese beef tongue, you will understand why the cravings were legit. The perfectly scored meat with the subtle smoke of the binchotan incasing it as the fat drips down. It's spectacular and there really isn't anything like this flavor.
Here is their beef tongue curry. Simple, but very delicious. Tender beef in a rich curry sauce to be accompanied by rice and fukujinzuke (best w curry).
My beef tongue came with rice, the most amazing scallion soup made with beef bones, and an incredibly delicious salad. I like to eat each piece of beef with a little wasabi followed by their pickled greens.
I can't really explain the comfort level of this dish besides it making me happy every freaking time. I assume this is oxtail tongue as it reminds me of Gyutan Tsukasa here in California (can find GT in Mitsuwa, Costa Mesa).