I was actually told to take a certain number...however, it was when I would take 15 Cotazym-S capsules! (The recommended was about 6 or so!)
I still had some issues with the enzymes, but it wasn't until later years that I would adjust the amount based on my own judgement.
But, I had found out some Japanese dishes really fill you up, while others "evaporate" as soon as you finish eating.
Udon is very good when having stomach issues, it's very easy to digest.
Soba is very good for feeling "filled up" for a long amount of time, it's more time-consuming to digest.
Rice can be filling sometimes, but it seems to depend on what it's being served with. As sushi, it seems to take quite a bit to fill me up, but as a "donburi", it'll fill me up pretty good. In comparison to Soba and Udon, it's right in between the two as a meal that has a bit of endurance.