I was lucky enough to be in Nara 2 years ago when the annual Shōsō-in treasure exhibition was on:
https://www.narahaku.go.jp/english/exhibition/2017toku/shosoin/2017shosoin_e.html
There are items on display each year that date from the early 700’s. Yes, not 1700’s, but ~1300 years ago. They had a stone recorder (musical) from that time, just astoundingly well preserved. So maybe these items still do actually exist…
Oh dear - Microsoft Edge (and so probably Bing Translate) had a troublesome time with the catalogue entry for the stone shakuhachi:
Chrome has it as ‘ball shakuhachi’ and avoids the… awkward… translation)
