Not sure if I understood what you mean by translating western scales and the notes but if you need a graphic with the name of the notes on it (like do re mi or C D E or on a music staff) maybe I can try to make something on Sunday. (Tomorrow I am having a gig for a tea ceremony).
Found it for ukulele: http://www.justinguitar.com/en/UK-010-UkuleleNotesOnNeck.php
Since for a while I don’t plan to wander off the standard tuning.
Next I’d need to figure it out for an E-B-E tuned shamisen (niagari, again). Funny that I haven’t yet figured out basic stuff like what’s a ‘standard’ tuning on a nagauta instrument.
Karl’s shamisen scale viewer was just awesome for this but nowadays one has to figure it out some other way.
For best teachers and best players, they seem to be different sets of people in my experience when it comes to shamisen. Think between expanding the boundaries of what you can do and explaining the most basic things to another human being so they understand. Two separate skill sets and two different kinds of people who enjoy and excel at these things.
I recall Reigen Fuji did stuff with chords but I think that was rather advanced (did he develop a new tuning to make chords easier?), there may even be a Bachido lesson about it.
Not sure how hard shamisen actually is to learn to play compared to western instruments, it seems ukulele is a world of difference. A lot comes from the bachi being intimidating and western people not used to it, plus it’s hard to handle without a live teacher. Are you even holding it straight?
Arrangement of Bachido material should be rethought at some point, too. For one thing Kyle today has the benefit of several years of trying and teaching shamisen to people over the Kyle who wrote Shamisen of Japan. Things like special techniques maybe coming way too early into the material and making it feel unnecessarily complicated.
Also most of the learning goes from playing songs solo. In some ukulele lessons they start with chords (guess that’s thought of as an advanced subject here) and strumming (there is just one? video about this on Bachido)! What if people just got some friends and started jamming - ie. ensemble playing and you’re more like the 2nd bass than the solo guitar?
But there isn’t much material like that. Could make sense for Bachido to create videos where they teach us several parts of the song. Think Kevin did this for Ninjari Ban Ban. Otherwise you can dig up material from youtube and just play along (enka seems to sometimes work really nice for this), but then you are improvising and most people would probably benefit if there was an indication of what notes or chords to play.
Ukulele being a popular instrument there are nice pieces like http://www.youtube.com/watch?v=cEY49XhO4P0