This is a Japanese-style traditional music inspired by a high-class Japanese restaurant where one might dine while viewing cherry blossoms.
The shakuhachi, shamisen, and koto play the same melody in unison, but the timing of each note is slightly different due to the characteristics of the instruments. I hope you can feel the characteristic fluctuating elements of Japanese traditional music from such a part.
Also, this piece uses a "Akino scale," which is a unique scale based on the traditional Japanese musical scale.