I would say both also cannot make it.
Ajisen actually not bad, but I prefer Kyo-nishi near China Square,
I go there for lunch sometimes. The soup is super thick and
delicious. One of the best ramen in SG. Very good ramen also is
next to Centerpoint, got this little Jap store run by a Japanese
chef. That one soup super good. It's near the food court. Forgot
name of place.
Sushi, Sakae completely cannot make it. Genki certain places not
bad, but overall standard drop also. Sushu Tei is good stuff,
considering your pocket won't hurt too much.