I've spent so much time philosophizing and talking in my articles about the 32 virtues; ie. the types of Fuiki and what causes each of them. It was a long time after I arrived at more or less the current model of virtues that I began to think hard about Tier 2 - happiness and sadness. Now I've finally finished it (of course it's still subject to change). I've identified 15 prime emotions (not counting the negatives separately) that can be loosely divided into 3 groups of 5. Also note that, as with the virtues, I had to fudge the English language a bit (eg. separating "happiness", "joy", and "gladness" into three separate ideas), because English was not invented by philosophers.

(My article on nonreactionary feelings is a prerequisite to understand this one, because I only list the reactionary emotions, and leave the existence of the anticipatory and subverted versions implied.)

Emotion Name Trigger
Power/success-related emotions
Joy, SorrowGeneral success/failure
Gladness, Self-pityOwn percieved fortune
Awe, DisdainImpressive accomplishment or epic failure (by oneself or others)
Pride, HumblingAmoral self-opinion raised/lowered
Epiphany, FrustrationUnderstanding gained/lost
Interpersonal/relationship-based emotions
Gratitude, Anger (personal)Other has helped/hurt self
Dignification, EmbarrassmentStatus gained/lost (footnote below)
Companionship, LonelinessBeing with/away from friends
Peace, AgitationBeing away from/with anti-friends
Laughter, Anti-laughterHumor, failed humor
Morality-related emotions
Empathy, SympathyWilled prosperity of other / unwilled suffering of other
Satisfaction, EnvyWilled suffering of other / unwilled prosperity of other
Admiration, Anger (ideological)Other wills in accord/discord with own ideals (footnote below)
Effect-Fuiki, Effect-guiltPride in the result of one's actions
Opinion-Fuiki, Opinion-guiltMoral admiration of / anger at self

Footnote on Dignification/Embarrassment: This concept of "status" is a complicated one. I used to think it was the same as dignity, but not anymore. So I think status is basically your internal idea of what people think of you in the moment (so of course it's less embarrassing if you're with friends or people whose opinion you don't care about), and there are at least three things that contribute to it:

Footnote on Admiration/Anger: the concept of "ideals" is one that took me a long time to pin down. I think it's "what you'd will if you didn't have a personal stake in it". So by this token you can admire someone for being closer to your ideals than you, whereas back when I just called it "other wills in accord with self", that wasn't possible.

A few notes about things that aren't on the list and what they're composed of: