The attributes of shakuhachi are intertwined. As such, some attributes will be diminished or lost in the pursuit of others. For example, a narrow bore will be faster, easier to play, and have more 3rd register notes. However, narrow bores such as many modern jiari can feel constricting for some because tonal range in Otsu and Kan is lost in the exchange. Narrow bores make for a high treble, “brassy” sound that’s more “cutting” or “piercing”. By contrast, a medium to wide bore, such as those most often found with jinashi and jimori, will have more bass for a “warmer” or more “woody” sound.
Essentially, refinements like sculpted jiari and cast-bore shakuhachi bring the sound closer to that of a cylindrical bore silver flute. Namely, refinements will reduce inherent character but boost volume, ease of play, and clarity. Inherent character comes from imperfections or deviations from cylindrical or uniform. We could say that inherent character is imperfection. An abundance of inherent character in a shakuhachi can enrich a solo playing experience. Conversely, it can clutter-up, muddy, or get lost in an ensemble. In the end, all shakuhachi are balanced differently with their own strengths and weaknesses. Ro on, Jon~