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Sub-New Feature
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Resolution: Unresolved
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https://ja.wikipedia.org/wiki/%E4%B8%89%E5%8D%81%E7%B5%83
http://shinmiyashita.jp/aaa/
This isn't a very common instrument, but I found myself editing a release that credits it on one track (風韻). It was invented by Shuretsu Miyashita in 1955. There are multiple commercial recordings that feature it.