Hi NoodleAir.
I believe they have chinese noodle shops in china ..and they also have japanese style ramen shops in china ...different for sure .
the last time i was in soho, wagamama had a distinctly japanese style menu with japanese dishes ...however i do agree that their food is not authentic japanese or even chinese ...
However i would stick to my conviction that wagamama is NOT a chinese restaurant ..if you want that just go a bit deeper into Soho then you have indeed the real thing ..although mainly Hk style.
And yep not a lot of it in africa so i have to pop over to Osaka or Shanghai for my fix.