We're visiting Chowhounds from San Francisco looking for great sushi (omakase) with an emphasis on nigiri/sashimi, and the best ramen and yakatori you can suggest. we're staying at the Cerulean Tower, Shibuya. This is our first time in Tokyo, and I see from looking at the boards that we've ended up in the equivalent of Times Square NYC.
That being said, we're adventurous and happy to jump on a train to find great food. Our main aim is to eat our way around Tokyo, so if you can help us out we'd be most grateful!
Also, any recommendations within walking distance, if the food is great would be wonderful.
Thanks so much for your help!