鬼金棒ラーメン / Kikanbou Ramen specializes in kara-shibi ramen. The main shop is actually two shops next door to each other in Kanda, and there's also a branch in Ikebukuro as well as two in Taiwan.
"Kara" means spicy and "shibi" means tingly, and you can specify how much of each you'd like in your ramen on a scale from 1-5. The tingliness comes from sanshou / Japanese pepper, which floats like black powder in the oily soup. It's a classic flavor combination but an unusual look for ramen.
Besides their regular food menu, they also have their own oni-style Kintarou-ame (a kind of hard candy) and they sell their kara-shibi powder for you to take home.
Over Golden Week I went and gave it a shot, sticking with the standard kara-shibi levels. The soup was rich and satisfying, and I actually didn't think it was that hot - next time I'll probably keep the shibi normal and ask for it spicier. I'm used to having noodles that are hotter and shibi-er on occasion, but the balance of the default serving at Kikanbou performs the remarkable feat of drawing out the flavor of the soup rather than being merely intense. Definitely worth another visit. Ψ