Preliminary info:
One of the most important and often used chord progressions in music is the 2-5-1. As it moves a fifth from the 2 to the 5 and a fifth from the 5 to the 1, it is an extremely strong cadence. A common change to the 2-5-1 is the 6-2-5-1, which is basically just going backwards by a fifth from the 2 chord
Now, what the FUCK does any of this have to do with muh anime girls? Well, the 4-5-3-6 is simply an alteration to the 2-5-1 progression, as it uses a couple of things called chord substitutions. Think of chord substitutions as two different chords that share the same general "sound" as eachother, by way of sharing important notes. What are important notes? The notes in a chord that most strongly indicate it's quality are the third and seventh, In C major7 that would be the E and the B. But for now just take it as "chords that share notes are substitutional for eachother"
Now, the two chords that work best as subtitutions for the 1 chord are, can you guess...? The 3 and the 6 chords, it makes perfect sense if you look at how they're built(CMAJ is C E G B, Emin is E G B D, look at all those shared notes...(drooling)) As for the 4 chord, it would be the 2 and the 6.
So now we have some options, instead of a 2-5-1, we can substitute the 2 for the 4, and the 1 for the 3. Now we have a 4-5-3 instead of our lovely 2-5-1. And the 3 is, what do you know, a fifth from the 6. How nice.
The Royal Road is a never ending cyclical nightmare that JPOP has been hypnotizing us all with for decades. the 6 goes into the 4, to the 5 to the 3 to the 6 to the 4, forever until we all die, and I would say 90% of the anime every season uses this hypnotic spell in it's opening or ending. Also it's used in Never gonna give you up by Rick Astley.
Preliminary info:
You may have noticed this monstrosity from the last page, a whopping 11 chords! It's nearly unprecidented for a chord progression, so what the hell is going on here?!
Again, this is simply a little twist on our old friend the 2-5-1. We start on the 1, we know the 6 is a nice place to go to from there, but if the 2-5-1 is the strongest way to resolve to a chord, why not put a 2-5-1 before our 6 chord? We'll play the 7 chord as a minor7, and we'll play the 3 chord as a dominant7. then after we're at the 6 chord the next chord we would commonly go to is the 4 chord, so we put a 2-5-1 before that too! And you get where this is going. It's a 1-6-4-5 with a bunch of 2-5s in between them, that's why the number of chords is so crazy. This progression is most famous in Hare Hare Yukai, Hare Hare has a little twist at the end, which you can read about in the Modal Mixture section of this site.
Preliminary info:
My fav progression of the bunch, the 4-3-6-?... Why the question mark? Because this progression has had so many different endings that putting any one there would be unjust. I'll go over all the variations at the end.
In C major, or A minor(read the tips section) The progression goes from Fmajor7, to Edominant7, to Aminor7. Now, I'm going to tell you something amazing. This is just a 4-5-6 progression. How?! Because the 3dominant and the 5dominant are substitutions for eachother! But how can this be? DIMINISHED CHORDS...!(Are you excited?)
Diminished 7 chords are built with gaps of 2 semitones between each of their chord tones, a C Diminished7 chord goes C-Eb-Gb-A. Now, what happens if you lower one of these notes by 1 semitone? You get a dominant7 chord, and because diminished 7chords have the same number of gaps between each chord tone(the other chord with this attribute being the Augmented chord) You can lower any of these 4 notes and get a different dominant, and all 4 of these dominants are substitutions for eachother. Yes, that means from the 4 to the 6, you can use either the b2, the b7, the 5 or the 3 chord.
So that's how it works, aint chord substitutions neat? Now here are all the ways I've heard this progression end: 1dominant, 5minor, b5halfdiminished, 2dominant, 6dominant. Of course, there are other ways to do it, these are just examples I've heard used before.
Little things to know going forward: