A lot of Asian households are multi-generational, so the maths definitely checks out there.

I'm putting my money on more people (8-10) but eating less than 200g per meal (1/2 cup uncooked, ~100g for most people)

EDIT, just saw sibling, that's impressive for 5 people, unless the dogs eat a lot of rice too.

It's actually traditionally 1 cup exactly here (scoop a measuring cup out of the rice cooker per plate). Most people in my house are 2-3x daily, I'm 1-2x daily because I didn't grow up eating rice (I prefer bread). We have 2 rice cookers going at dinner because 1 one is for the dogs exclusively.

It fluctuates but on average maybe 5 humans and 10 dogs.

You give rice to the dogs, too?

Yup - family dogs eat what we do. Funny story - my mom's dog will not eat rice unless there's also fish (leftover bones will do). Rice+fish - bowl is cleaned up. Rice+meat - only the meat is picked and eaten.

Read the ingredients on a can of dog food, there's either rice or corn in it. They prefer rice.

That’s an amazing volume.