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Bassworks' JPJ5 "Katana" series of basses owe some of their inspiration to Leo Fender's bold asymmetric design in the 1960s.


Despite their design influences, our instruments strive to improve on what has gone before. Our chambered body being supremely light but strong and resonant.

The JPJ5 sports a Bartolini dual in-line coil pickup (humcanceling) at the bridge and a split humbucker in the neck position. From "Jaco to Jamerson"in an instant. Alternatively, you can configure the Katana as a "J5", i.e. J body, plus two J pickups and these may be specified as dual in-line hum-cancelling pickups or quad coils with up to 3 coil taps.

Our proprietary heel joint is very special and unique to us. It enhances sonic coupling and neck-to-body alignment.

30+ years of playing and our skilled manufacture deliver the tone, playability and reliability that all bass players deserve to enjoy in the JPJ5 series.


Crafted in small batches and entirely in our own shop, every instrument is built with the same painstaking attention to detail, using stable tonewoods and world-class electronics and hardware.

5 String
35" scale length (889mm)
22 frets
Hipshot 0.750" (19.05mm) bridge
Choice of constant or compound radii for fretboard, with matching radiused pickup ramp
Chambered Swamp Ash or American Red Alder body

Birdseye Maple headstock plate
Neck profile: Custom slim "J" influenced
2 carbon fibre re-inforcement rods
1 piece Canadian Rock Maple neck
Fingerboard: Rosewood (side markers, block inlays, bound), other woods are available
Bartolini PUs
Mike Pope (Now Trickfish Amplification) Flex Core 4 band Pre-amp (Graph Tech Hexpander MIDI board optional)
Telecaster style side jack
Hipshot (USA) Ultralite tuners

Graphtec TUSQ XL nut (Black)
2-way truss rod,  heel access
"Narrow/Medium" frets with "Invisible Fret Ends" (other sizes of fret-wire are available)

Hiscox custom hard case included

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