Okinawan Sanshin Replacement Strings, Ryuo Brand, Size 2, 2 Sets, Brand New and Unused Ryuo Brand is as famous as it gets for Sanshin strings! Excellent quality! Includes 2 Otokagen (male string), 2 Nakagen (middle string), and 2 Onnagen (female string). Size 2 is the most popular size (string thickness). Will be shipped via standard mail. Please note that this will be posted through your mailbox (we are not responsible for loss or damage).