Ramen Jiro was (and still is) quite popular at Mita campus, Keio University. It is a kind of ramen, yet quite different from the normal one, the detail’s here.
And here is an excellent podcasting in mp3 by the guy named Andy Raskin, who also recommends to order “sho” (small). My order, too, was “sho” or “小” in kanji (small sized, not really small it is quite big) + “Buta” (pork, again means more pork, in fact I regret it was too much) + “Yasai” (vegetable, mostly cabbage and moyashi=beansprout, they are always good). My advice : don’t order anything other than “tadano ramen” (normal ramen), especially if you are over 40.
If there were any reasons for me to go to Mita campus except taking exams (I rarely attended classes) back when I was a student there 20+ years ago, it was only Jiro Ramen or 二郎ラーメン. And my GPA was a history low of the University, but that is another story.
Incidentally my office is quite near; so I visited Jiro to Google My Map below. By the way, Google’s new MyMap is quite nice, as you might agree. Yet it would be much nicer if I can embed that map in the blog post, like I embed YouTube video.
Update: Here is Ramen Jiro community inside facebook.
Update2: google map now allows embedding the map (below).