Kenzo Ramen on Yonge is a great spot. I've been to this location, along with the Sheppard location and the Dundas location and this one is my favourite.
I made reservations for 10 via e-mail and then phone communication. Some restaurants don't do very well keeping on top of their email account but I always got responses within 24 hours when trying to see which of their locations would be best to cater to my group.
The prices are great. $8-14 was the entire price range for ramen I think which is really good.
We had 8 show up, and everyone was satisfied with their ramen. A few of the guys ordered Sapporo, which came with complimentary wasabi peas. The menu has a good variety to choose from. One guy got the Yakisoba (stir fried noodles with chicken vegetables on an iron plate) and said it was done perfectly. I thought it was neat that it came on this skillet/tray sort of thing. I had the King of Kings Ramen ($12.95?), and as usual was satisfied (and full) by the time I reached the bottom of the bowl.
Will be back again if I'm in the area.