MSRP¥120,000 w/o tax


NAS Jan /

BLKS-B Jan /


Body Top

Spalted Maple




Roasted Maple


Roasted Maple




JB bridge w/ brass saddle




Nickel Silver


Original JB set


2Vol, 1Tone (Pull-up = turbo switch)



Fingerboard Radius


Width at Nut





D’addario XL-165


Gig bag, Allen wrench, COA

Specifications and design details are subject to change without notice.


Bacchus Japan Tune-up Series

Bacchus Japan Tune-up, a new series of Bacchus products launched last year, has introduced a new model based on Bacchus’ ever-popular WOODLINE, which uses the exotic wood known as “Spalted maple” for the body top!

■ About the JT Series

The Japan Tune-up Series (commonly abbreviated as the “JT Series”) is a lineup with a focus on playability that has been carefully tuned and set up by a specialized team in our local Matsumoto City, in Nagano Prefecture, that focuses on maximizing playability and all aspects that would improve the player’s experience.

In addition to the items shown in the images, we also carry out some thorough tuning up, including string height adjustment and final finishing of the fretboard, which directly affect playability. New guitars and basses are often difficult to play right out of the box, but with the JT series, we are committed to supporting your musical life from the day you buy it.

Spalted maple that radiates uniqueness

*The grain patterns of spalted maple vary from model to model.

The most distinctive feature of this model is the -spalted maple- used for the top material. “Spalted” is a term used to describe wood that has developed a characteristic pattern as a result of decay caused by bacteria and other factors in nature. Spalted wood is often used for decorative purposes in handicrafts, and has a different feel from the more common flamed and quilted woods.

Instead of a glossy finish, a matte finish with an extremely thin layer of paint is used. Compared to a standard finish with a thicker coating, the matte finish transmits the string vibration more directly to the body.

WOODLINE-style slim body

It inherits the downsized body shape of the high-end WOODLINE series, which was developed for the Handmade series. The body is slightly slimmer than a typical JB-type electric bass, which provides excellent playability. Black binding is applied around the perimeter of the body to give it a high-class, tight look.

Custom brass neck backplate

This model features an original brass neck plate with high specific gravity used at the joint. The bass tone is made heavier than conventional models and extends into the mid to low range with a dense, full tone.

Standard WOODLINE Series Turbo Switch

The “turbo switch” common to the WOODLINE models is also featured on this model. Pulling up the tone knob turns on the turbo switch, which connects two single pickups in series to produce a fat humbucking pickup-like sound. (*When the turbo switch is on, the volume is adjusted with the front Vol knob. The rear Vol knob is bypassed.)

Roasted maple neck with increased rigidity

The popular roasted maple neck, a new Bacchus standard, is also used in this model. The heat treatment not only makes the neck highly rigid and resistant to warping but also produces an aged sound with a good attack.

Bacchus Japan Tune-up Series Feature Site


OK bass JT-Series review video