“J” COLLECTION

MASTER CRAFT J3

A Refined Minimalist Timepiece Embodying the MINASE Philosophy

The J3 is a reinterpretation of the celebrated M3, one of MINASE’s iconic models, reimagined through a contemporary design approach and new engineering philosophy. Designed as a simpler expression of MINASE craftsmanship, the J3 preserves the brand’s signature architectural case construction, extensive Sallaz hand-polishing, and carefully finished dial while presenting them in a slimmer and more understated form.
Through the J3, MINASE hopes to introduce a wider audience to the values behind the MINASE philosophy—an approach to watchmaking that places equal importance on precision, hand-finishing, and beauty in the smallest details.

The roots of this design trace back to the Master Craft M Series, regarded as the origin of MINASE watches. Developed by KYOWA, a precision cutting-tool manufacturer, the M Series was created by applying the company’s manufacturing expertise to watchmaking without compromise.
Following the M1 and M2, the M3 was introduced under the concept of “ultimate simplicity.”
In the years that followed, MINASE introduced the structurally distinctive HiZ Series, steadily gaining international recognition. At the same time, collectors and watch journalists continued to praise the M3 for expressing the spirit of MINASE through its restrained and minimalist design.
Responding to this appreciation, MINASE revived the M3 in 2018 after more than a decade. The J3 has now been developed based on that revived model, interpreted through a fresh perspective for today.

A Simpler Expression of the MINASE Philosophy

The Master Craft J3 embodies the craftsmanship philosophy at the heart of MINASE.
One of its defining elements is Sallaz polishing, a meticulous hand-finishing technique performed by skilled artisans. Known for producing distortion-free mirror surfaces and sharply defined edges, Sallaz polishing has become one of the defining characteristics of MINASE watches.
On the J3, Sallaz polishing is applied not only to the bezel, but also to the case sides and the angled surfaces of the case back. This extensive finishing process creates crisp transitions between mirror-polished and hairline-brushed surfaces, emphasizing the architectural form of the case while reflecting light beautifully from every angle.
Despite its minimalist three-hand layout, the watch offers a distinctive visual presence with understated elegance.
Attention to details that cannot be achieved through mass production remains central to the MINASE philosophy.

Reinterpreting the Legendary M3 Through a More Elegant and Refined Size

The Master Craft J3 draws inspiration from the sculptural case design of the acclaimed M3, redesigned under a new concept for a more elegant and contemporary presence. The case diameter has been reduced from 38.8 mm to 37.4 mm, while thickness has been refined from 10.8 mm to 9.9 mm. By refining proportions down to hundredths of a millimeter, MINASE has preserved the distinctive beauty of the M3 while creating a more compact and refined profile.

DIAL

The Delicate Texture of the “Light Sand Dial”

The J3 is available in three dial colors: White, Beige, and Gray.

Each dial features MINASE’s signature “Light Sand Dial,” developed to create a delicate texture with subtle depth and a soft interaction with light. The finely textured surface gently captures and reflects light, revealing different expressions depending on the viewing angle and surrounding environment.
Sharp-cut applied hour markers create a refined contrast against the textured dial surface, adding subtle dimensionality to the minimalist design.
For enhanced visibility in low-light conditions, both the applied hour markers and the hour and minute hands are treated with blue luminous material, providing excellent legibility while maintaining the clean aesthetic of the dial during daytime.

STRAP OPTIONS

Create a Timepiece That Reflects Your Style.

The J3 offers a variety of interchangeable strap options, allowing wearers to personalize their watch.
Each dial configuration comes standard with an embossed calf leather strap, though customers may select an alternative strap at the time of purchase.
Additional straps may also be purchased separately.
All J3 straps feature a one-touch quick-change system, allowing effortless interchangeability.
Wearers are encouraged to create a unique combination that best reflects their personal style.

Lineup

Adorned with a “Light Sand Dial,” this timepiece is offered in three distinct shades: black, white, and beige.

Dial Lineup

Each dial can be paired with 1 metal bracelet, 4 embossed calfskin straps, 3 crocodile-embossed calfskin straps, and 2 rubber straps, offering a total of 10 options per dial.

Black Dial

White Dial

Brige Dial

Combination Examples

Order Additional One-Touch Straps Separately

Designed with a One-Touch mechanism, all J3 straps can be effortlessly interchanged. Choose from 4 embossed calfskin options, 3 crocodile-embossed calfskin styles, 2 rubber straps, and a classical stainless steel bracelet.

Classic stainless steel bracelet

Carefully polished to perfection, this bracelet boasts a refined simplicity and a luxurious feel.

Embossed calf leather straps

Crafted from genuine cowhide leather, each strap is meticulously handmade by skilled artisans.
Available in 4 distinct colors.

Crocodile-pattern calf leather straps

A timeless classic, this cowhide leather strap features an embossed crocodile pattern.
Available in 3 elegant colors.

Rubber straps

Sleek and stylish, this rubber strap is crafted from a soft material for a smooth, comfortable fit.
Available in 2 versatile colors.

Retail Availability

MASTER CRAFT J3

Case Diameter: 37.4 mm
Case Thickness: 9.9 mm
Case Material: Stainless Steel
Crystal: Sapphire Crystal with double-sided anti-reflective coating
Strap: Calf Leather / Rubber (18 mm width)
Bracelet: Stainless Steel (18 mm width)
Movement: MIYOTA 90S5 Automatic
Frequency: 28,800 vibrations per hour (4 Hz)
Power Reserve: Approximately 42 hours
Accuracy: -10 to +30 seconds per day
Water Resistance: 5 ATM

* The photo shows the standard model (white dial / blue embossed cowhide strap).
* Please note that straps and bracelets designed for the M3 are not compatible with the J3.