Will not be available because Zadok‘s computer decided to die 5 minutes before the recording ended, and all was lost D:
However, Zadok also says “I did some research and it seems it’s not unheard of NHK releasing the soundtracks for their NHK Specials, so they just may release a “Sekai Satoyama Kikou OST””
I’d tell everyone to buy Z a new computer but there is no time left no time left and no one reads this anyway XD
The last episode airs tomorrow (August 27) at 10pm Japan Time.