I’m not very familiar with those scales. Though you might want to look into the tuning. I am familiar with the Chinese pentatonic scale. Chinese use the fourth and seventh, but they both considered weak, and play mostly pentatonic music. In part it is the tuning of the notes. They arrive at the scale by tuning a sequence of perfect fifths and perfect fourths. EG the first and fifth are perfect, the fifth and second are a perfect fourth. The second and sixth are a perfect fifth, the third and sixth are a perfect fourth and so on. Of note, the octave in this tuning is not unison and the fourth and seventh are notably kind of off hence the weakness and deemphasis.
While still being diatonic, it has a peculiar sound, eg suspended seconds and fourths have much more meaning, and are more functional than western equal tempered. Often times there are cycles of modes that yield motion rather than typical V->I transisitons.
You might want to look into how they actually tune the notes for the Japanese instruments, being pentatonic there is little relation to the Chinese pentatonic in actual intervals or function.