Be it during lunch or dinner, the long queue outside the store probably says it all. The sister's branch are all in the same vicinity, along the same stretch you'll find Gyoza King & slightly further you'll get Ramen Keisuke Tori King!
Keisuke Tonkotsu King is probably the closest you can get to an authentic bowl of ramen. The ramen scene in Singapore is getting explosive these days but personally, this could be one of the best Tonkotsu pork base ramen in Singapore.