tried some yrs back. normal to bad quality but extra diasppointing tampura. sloppy... plus it's not like price matching the quality, as u'd expect from Sumurai Sushi on Cambie / W 41st.
the 2 restaurants are not related...at least not to my knowledge?
Yokohama belongs to $20-40/person price range but food-quality-wise not even comparable to Sumurai $5-15.