The Ibanez JS1 is a JS series guitar model and the first signature model Ibanez made for American guitarist Joe Satriani, introduced in 1990. It is based on the Radius models featuring the same body shape. It continued as the JS1000 in 1994.
In 1992 the JS1 was slightly changed: a middle pickup, the new Lo-Pro Edge tremolo and a matching headstock were added to the setup. These models are the only JS models with a middle pickup.