This story is a bit confused on what it wants to be and who it wants for reader/listener.
The viewpoint characters’ narratives run at different speeds, sometimes creating abrupt tonal changes or breaks in the narrative. The genre is fuzzy as well. Clear cultural inspiration is derived from WWII Japan, but it seems determined to be historical fiction, epic fantasy, and pure drama all at the same time.
Aside from that, the story structure is strange. It feels like more 2-3 seasons of a TV drama than one self-contained story. Even into the final chapter, this book continues to present the reader with new world elements and foreign and/or original terms. Even as someone familiar with Japanese and language theory, I found the manner and frequency of foreign/fictional terms to be the least reader-friendly part of this book.
If none of those are deal-breakers for you, you should enjoy the deep heart of this story. There IS a conclusion and it IS worth waiting for. I will hope to see this author grow in skill and focus in later works.