Hai, I made much use of Jirajoshi mode in my ballet "Amaterasu", a bit throughout, but very prominently in the 4th movement.
I got around some of the limiting elements of pentatonic scales by first transposing the scale on itself. This gave m a bit of freedom.
basically, write out your scale in fundamental position: C - D - Eb - G - Ab
then you write out all the "inversions" of the scale:
starting on D: D - Eb - G - Ab - C
starting on Eb: Eb - G - Ab - C - D
starting on G: G - Ab - C - D - Eb
and lastly, starting on Ab: Ab - C - D - Eb - G
This is simple, but it's only the first step. Now, transpose all those inversions down so that they all start on "C".
This gives you different modes now, but that are all related to your initial mode:
"D" : C - Db - F - Gb - Bb
"Eb" : C - E nat - F - A nat - B nat
etc...
I tried an alternate method of getting this, which was to simply transpose the scale chromatically to all 12 semitones. I then selected ONLY those transpositions which contained a C natural in them. The end result was the same as using my first method.