The dojo is a hybrid instrument designed as a cross between the Dobro

Dobro

Dobro is a registered trademark, now owned by Gibson Guitar Corporation and used for a particular design of resonator guitar.The name has a long and involved history, interwoven with that of the resonator guitar...

-style guitar and the banjo

Banjo

In the 1830s Sweeney became the first white man to play the banjo on stage. His version of the instrument replaced the gourd with a drum-like sound box and included four full-length strings alongside a short fifth-string. There is no proof, however, that Sweeney invented either innovation. This new...

.http://www.blues-banjo.com/instruments/family.html The body and resonator are like the Dobro, while it is strung like a five-string banjo. The tunings and fingerings are also just like a banjo. The intention in creating the dojo was to give banjoists the opportunity to get a completely different sound without having to learn fingerings for an entirely new instrument.http://www.goldtone.com/products/details/w/instrument/76/Dojo Dojos have a much more mellow sound than a banjo, and plucked notes are sustained longer due to the resonator.http://www.folkofthewood.com/page3461.htm