When in Kyoto, eat like the Kyotonese at Tenka Ippin. Although there are several locations across Japan and the World, nothing compares to slurping the potage-like ramen in its home city. I recommend going to their honten, but if you're in a hurry (like I was) this location is closest to Kyoto Station. You have two choices for soup base: Kotteri (thick) or Assari (light). Get the Kotteri! It's a thick, collagenous, high viscosity base made from chicken and vegetables. It's unlike any other!
From Kyoto Station take the Hachijo East exit and begin walking to your right. In 2 minutes you'll come to an intersection with the railways right above you. You should see Tenka Ippin on the corner. Open from 10:30am to 10:30pm and closed on Sundays.
Other sites that mention Tenka Ippin Hachijoguchiten: