Because I never wrote it down on any of the pages, I need to put a little explanation on what my charts mean. 
Chords:
So first off, I’ve diagrammed these in the middle of the fingerboard as moveable chord forms, instead of open forms at the nut. I’ve drawn out the bars and I’ve noted that they can be interchangeable with the nut, so that open forms can also be played. In addition to that, I put Roman numerals for fingering info. I also color-coded the root, because the chord is named after the root note. So, whatever note the root is on becomes the base note of the chord. (i.e. When the root of the major form is on G, the chord becomes a GMaj chord.) That way, any chord in the category (major, minor, etc.) can be formed from this one chord shape, instead of me drawing out every imaginable variation.
I was unable to diagram more advanced chords like maj7 and min7 because higher level chords require four or more notes to distinguish themselves from the more standard chords. Seeing that the shamisen only has three strings, these chords would either have to be played as arpeggios or in a duet, with one player playing the base chord and the other playing the accented notes over it. So, I left these out and did four of the more common chords that only require three notes instead.
Scales:
I’ve color-coded most of the important notes in the scales, and the forms will work for any key, you just need to change the shamisen’s tuning. I’ve also double and triple checked each of the scales, so I’m pretty certain that they’re accurate and free of careless errors. I did have to name a couple new positions, specifically “9#” and “13#” in order for some of the scales on the chart to work, but I don’t think that should cause an issue. My shamisen still only goes up to 21, with 21 being the 2nd octave.
And my handwriting is awful, so when the legend looks like it says “67th” and “63rd,” I mean flattened 7th and 3rd. It’s supposed to be a “b”.
If you have any questions, feel free to message me. I’ll be happy to answer whatever you’ve got!
I think there was some issue in the Composer part, so I went back to the old one, should really check if I can see it again and report it.