UPDATE - 2008-10-19 - I haven't been there recently myself but I have it on good authority that Junk Garage has moved to Saitama Prefecture.
Junk Garage is known for a very different style of ramen, more of a "bunch of stuff in a bowl" style, as you can see from the pictures. We arrived at about 6:30 PM and there was a line of about 10 people already. There are 7 seats, interesting wood paneling on the counter and and lots of porn under it. Junk Garage is only open in the evenings, starting at 6 PM. It's right next to the famous Rokurinsha (六厘舎), which closes at 4:30. You have to be very careful standing on line as the cars come down that street very tightly, the store staff comes out every few mins to take your tickets and remind people to stay behind the orange cones. The base style that the shop is known for is the mazesoba (ma-zeh, まぜそば), that's firm noodles with a bit of oil and just a small amount of soup in the bottom of the bowl, similar to shiru nashi (汁なし) style or abura soba (油そば). And it had some coarse-ground black pepper on it, just a perfect amount, and the noodles were done perfectly. There were some noodles of a thinner width in the bowl but they were mostly thick, almost as thick as the chopsticks as you can see from the picture. They have ramen too, and it is prepared in a manner very close to the Jiro style. The set of available toppings is slightly different for ramen vs. mazesoba, and you can see a picture of the toppings menu below. By default for the mazesoba you get a raw egg on top (actually the yolk only), so be sure to tell them if you don't want that. The default amount of garlic was a little small, perhaps get ninniku mashi. However you can only get yasai with the ramen, not with the mazesoba. Free tissues on top of the ticket machine round out the deal. Somewhat different and very impressive.
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Diddlefinger Map (English labels)