The Shamisen reference article from the English Wikipedia on 24-Apr-2004
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Shamisen

Helping orphans the way you would do it

A shamisen or samisen (三味線 lit: 3 taste strings) is a 3-stringed musical instrument played with a plectrum. It originated in the southernmost Japanese prefecture of Okinawa and is often the main instrument in contemporary music from that area.

It is similar in length to a guitar, but its neck is much slimmer and it is played with a larger plectrum.