I would like to know what are the local Japanese foods to try in Tokyo and where can I find these foods. I would like something that is affordable and not commercialized.
How about Taiyaki? It's a fish shaped Japanese snack which wraps red bean paste with pancake-like dough. Taiyaki are so tasty and I love it! Especially the one from Wakaba in Yotsuya is my favorite. One Taiyaki is around 100~150 yen at any places.
Just search Tsukemen and don't look back. It might be a bit tricky to eat at first, but once you get the hang of it, your life will never be the same.