KGR Harmony Kurofune Fuzz
KGR Harmony returns to the channel — this time with the Kurofune Fuzz, their Ram's Head-inspired fuzz in a cast iron nambu-tekki enclosure. Welcome back to Edge of Breakup.
In this episode the KGR Harmony Kurofune Fuzz takes center stage — featuring the Prisma Guitars Sunset with Lollar Novel Foil Neck and Lollar Low Wind Imperial PAF Humbucker Bridge, Emerson Custom wiring and Treble Bleed, into the Benson Amps Monarch 2x12" via the Boss Waza Tube Amp Expander.
Get Emerson Custom Treble Bleeds and Wiring Kits:
Treble Bleed: https://emersoncustom.com/products/2017-treble-bleed-circuit-volume-mod?sca_ref=6282128.5O9h8BhMpG
Potentiometers: https://emersoncustom.com/products/cts-potentiometers?sca_ref=6282128.5O9h8BhMpG
Les Paul Pre-Wired Kit: https://emersoncustom.com/products/les-paul-prewired-kit?sca_ref=6282128.5O9h8BhMpG
Strat Blender Kit: https://emersoncustom.com/products/s5b-blender-5-way-strat-prewired-kit?sca_ref=6282128.5O9h8BhMpG
KGR Harmony is Keijiro Fukushima, an electronic engineering graduate of Tokyo Denki University who spent over a decade researching how enclosure materials affect guitar tone before founding KGR in 2019. The brand is based in Iwate Prefecture, Japan — the same region where the nambu-tekki (南部鉄器) iron casting tradition has been practiced since the Edo period. KGR builds in partnership with Oitomi Ironworks, a cast iron forge established in 1848. Each enclosure is cast one at a time using a traditional sand mold process — Fukushima makes the molds himself, and because of this, no two enclosures are identical in surface texture.
The Kurofune — "Black Ship," referencing the black-hulled American warships that arrived in Japan in 1853 — is KGR's Ram's Head-era Big Muff-inspired fuzz. Clear, tight low end and a crunchy, full midrange that makes use of the resonant properties of the heavy cast iron housing. Three controls: Volume, Fuzz, Tone. The Tone sweep covers the range from bass-heavy dark fuzz to bright and emphasized. The enclosure weighs approximately 670g — roughly three times a standard aluminum pedal. Not true bypass.
The Prisma Guitars Sunset in this build is a two-pickup, Telecaster-outline guitar with a Les Paul-style 3-way toggle switch — a custom configuration from Nick Pourfard's shop in San Francisco. Alder body, maple C neck, reclaimed Brazilian Walnut fingerboard from the Coney Island Boardwalk, 25.5" scale, 6105 nickel frets, bone nut, nitrocellulose lacquer finish. Loaded with a Lollar Novel Foil in the neck and a Lollar Low Wind Imperial PAF-voiced humbucker in the bridge — a single coil / humbucker combination that gives the Kurofune's Ram's Head character genuinely different input material across the two pickup positions.
🎛️ KGR Harmony: https://kgrharmonyusa.com/products/kurofune-fuzz
🎸 Prisma Guitars: https://www.prismaguitars.com
🎸 Lollar Pickups: https://www.lollarguitars.com/lollar-pickups
🔊 Benson Amps: https://www.bensonamps.com/guitar-amplifiers
Subscribe for more boutique tone explorations.
🎸 Prisma Guitars Sunset | 2-Pickup Tele-Style | LP Toggle | Alder | Coney Island Boardwalk Fretboard | Lollar Novel Foil (Neck) + Lollar Low Wind Imperial (Bridge) | Emerson Custom Wiring + Treble Bleed | Nitro
🎛️ KGR Harmony Kurofune Fuzz | Ram's Head Inspired | Nambu-Tekki Cast Iron | Volume / Fuzz / Tone | Made in Iwate, Japan
🔊 Benson Amps Monarch 2x12" | Boss Waza TAE
Recording: Universal Audio Apollo x4 | Lauten Audio LS-208 | Royer R10 & R121 | Sennheiser E906 | Ableton Live 12
