Failure was almost guaranteed. The following is copy-pasted from their official website:
Welcome to Mentai-Ya, the acclaimed Japanese hawker chain in Singapore that serves amazing Mentaiko dishes at affordable prices. Since our establishment in 2020, we have been revolutionizing the local food scene with our high-quality and affordable Japanese Cuisine, offering a range of dishes priced from $7.80 to $10.80.
The suicide note for any Japanese restaurant.
If people want to eat cheap Jap food, they can go to Donki or Muji. At least those are mostly authentic.