That particular example, you buy it from a vendor, for 150-200 yen or 20-30 VND, not every example applies to literally everyone.

But also cold noodles and broth out of the fridge with a pre-made hard-boiled egg arent a bad way to start the day when the heat index gets to 118.

As for calories, dont make so much, dont drink the broth or you will have a heart attack.