Thanks for the suggestion

It's not about satiation for me. It's about quantity. My point was until I've eaten a plate of food where plate of food equals pretty much any "standard" picture of a plate of food (https://www.google.com/search?q=plate+of+food&tbm=isch) my brain thinks "Dang, you haven't really eaten yet" and yet pretty much every picture in that link is over >1000 calories.

Note, I'm not saying satiating foods wouldn't be better. Maybe I won't desire a snack later or maybe if I eat slow I'll stop earlier (unlikely). Rather, I'm saying many years of eating a plate of food, and possibly second helpings, has my mind thinking and looking forward to those quantities. As in "Oh Boy it's dinner time! Looking forward to that plate-o-food!" then "Awwwwwwww, that's all I can eat be under my limit. That's not even 1/2 a plate worth."

I do it but I don't like it because my mind/habit/experience/expectation is "meal = XXXX" not "meal = XX"

Silly as it sounds... have you tried using smaller plates?

I find having a small plate stacked high seems more like a "real meal" than the same amount of food spread thinly on a larger plate.

Then again, if you're in Japan, I guess you've been exposed to that trick a fair bit.

I recommend you read up on a bit and give it a try, in my experience once you get past the first few days it is MUCH easier than you would think. Also, I believe participating (or at least lurking) in a community, looking at progress pictures (and reading the stories behind them) provides a much needed psychological base to stand on for this task - as you've noted, you personally seem to have strong psychological hurdles.

Thanks. I'll give it try. And I'm not really having trouble. It just takes will power.

My point wasn't about my troubles. My point was, even if you came up with a pill that 100% satiated me, satiation is not the only thing I want from eating. I wouldn't be like "Yay! I had my meal in 1 second, I can get back to something else". Rather I'd be like "Whaaaaat? I wanted to stick delicious food in my mouth, taste it, chew it, lick it, swallow it. And I wanted to do that for 20-30 minutes."

There's enjoyment in the act of eating and for some, it requires quantity. I enjoy for example that Japanese desserts of often small. But I also missing being able to enjoy 40 bites of dessert rather than just 2 if that makes any sense. I enjoy eating a foot long sandwich over 10 minutes rather than a 1/4 foot long sandwich over 2.5 mins.

Sorry if I'm not making any sense. Like I said I'm not really having trouble sticking to my diet. Only noticing how I feel about it.

It sounds like intermittent fasting would be the thing for you. When you only eat one meal a day, that meal can be reasonably large. Many people do find it easier to get used to skipping meals than to eating tiny ones.