Having lived in Japan for some time, I can appreciate the difference between food made to seem Japanese, and Japanese food. There is something in the ingredients, the taste, the texture which you can't quite put your finger on - but you know when it is there, and when it isn't. This is why Kanada-Ya is one place I can really recommend.
Whether your coming for lunch or especially dinner, the first thing you should prepare yourself for is that you may not be getting in through the front door straight away - this place is popular. Evidence of this can be seen in the numerous heaters placed outside the restaurant to keep those queueing warm - that's right, those queueing - like I said - popular. Once inside you will be greated to a small but cosy dining space, with large shared tables, and window benches. The first thing you will notice though is the heat and smell of the lovely noodle broth readying itself for you to try.
The menu is compact but very workable - you have onigiri (riceballs) with various sprinklings and centres, and of course the lovely ramen noodles.
This is no ordinary ramen by the way. The ramen you will be tasting is actually the authentic recipe for Tonkotsu Ramen as developed by the restaurant's founder, Kanada Kazuhiro - who set up his first store in Yukuhashi, a small region in Japan. The ramen can be adapted in a variety of ways, including the firmness of the noodle, along with table pickles (my favourite touch).
Eating your noodles, and looking outside to the people obviously desperate to swap places with you make this a place you will want to visit again and again - a real authentic Japanese experience mere yards from Oxford Street.