I recently obtained "Ryukyu Shimauta Ee Yon" from a sanshin shop in Okinawa. This "Ee Yon" is a "limited edition" and was "newly released," so I bought a lot of them. I've decided to sell some of them on Mercari. After checking the contents, as expected, it's a well-made "Ee Yon," supervised by the "Ryukyu Ongaku Gakufu Kenkyujo" (Ryukyu Music Score Research Institute), which produces "Ryukyu Minyo Ee Yon." I recommend purchasing this "Ee Yon" as it's difficult to obtain for those outside of Okinawa. The regular price is ¥2,000 (excluding tax), but I purchased it in Okinawa, so I've slightly increased the price. Please consider purchasing a copy. Note: This book has some binding errors, so please refrain from purchasing if you are sensitive to such issues. This is a book where the binding was slightly misaligned during the binding process. The contents are intact.