It is sometimes harder to succeed with a simple watch than with a complicated one. When nothing distracts the eye, every proportion, every surface, every edge and every finish becomes immediately perceptible. It is precisely on this ground that Minase intends to demonstrate its know-how with the Mastercraft J3, a new creation that returns to the origins of the house while offering a more contemporary vision of its watchmaking.
Inspired by the M3, the brand’s founding model discovered internationally in 2023 through the M3 Nori, an exclusive edition made for Fratello, the Mastercraft J3 takes up the principle of a minimalist and balanced watch and reinterprets it in a more compact format.
With its 37 mm cushion case, its surfaces polished using the Sallaz technique, its Light Sand textured dials and, for the first time in Minase’s history, a Japanese Miyota 90S5 movement, the Mastercraft J3 opens a new chapter in the history of the Yuzawa manufacture.
A watch that does not seek to impress through complexity, but to convince through the precision of the detail.
On this page
- A return to Minase’s origins
- From the M3 to the Mastercraft J3
- The cushion case, signature of a mastered aesthetic
- When handwork resists mass production
- Three Light Sand dials
- Light as an element of the design
- For the first time, a Japanese movement
- Mechanics at the service of the essential
- A watch designed to be personalized
- A new gateway into the Minase universe
- Japanese craftsmanship as identity
- Minase Mastercraft J3: simplicity as an exercise in precision
- A presentation at Genève Watch Days 2026
- Technical specifications
- Frequently asked questions
A return to Minase’s origins
To understand the Mastercraft J3, you have to go back to the early years of Minase.
The Japanese brand had begun its history with the M1, quickly followed by the M2 and then the M3. These first creations carried a clearly defined ambition: to achieve a form of ‘ultimate simplicity’, a simplicity pushed to its most accomplished expression.
Later, Minase developed other collections that helped build its contemporary identity, notably Horizon, Windows and Divido.
The Mastercraft J3 today makes a return to the fundamentals.
Its design takes up the spirit of the M3 while abandoning some of its original dimensions and proportions. The result is a watch that is more compact, thinner and more accessible in its aesthetic approach.
The goal is not to reproduce the M3.
It is to understand what made its strength and to transpose it into a creation suited to today’s expectations.
From the M3 to the Mastercraft J3
The transformation is particularly visible in the proportions.
The M3 displayed a diameter of 38.8 mm for a thickness of 10.8 mm. The Mastercraft J3 reduces these dimensions to 37 mm in diameter and only 9.9 mm in thickness.
A few millimeters may seem insignificant on paper.
On the wrist, however, they profoundly change the perception of a watch.
The case gains in compactness and elegance. Its silhouette becomes more easily adaptable to different wrists, while its proportions allow Minase to present the J3 as a truly unisex creation.
The brand nevertheless retains the architectural element that gave the M3 its character: a cushion-shaped case surrounding a perfectly round dial opening.
This opposition between the geometry of the case and that of the dial creates a subtle visual tension.
The rounded square of the case brings a contemporary presence.
The circle of the dial introduces a more classic dimension.
The whole discreetly evokes certain watchmaking creations of the 1970s, a period whose influence also appears in the proportions and in the general treatment of the piece.
The cushion case, signature of a mastered aesthetic
The Mastercraft J3 is not a minimalist watch in the strict sense.
Its dial is deliberately pared down, but its case reveals a much more elaborate architecture.
The cushion shape offers several surfaces that allow light to circulate around the dial.
This construction takes on its full dimension thanks to the finishing work carried out by Minase.
The Japanese brand is particularly renowned for its use of the Sallaz polishing technique, a method that produces extremely clean mirror surfaces and particularly precise edges.
On the Mastercraft J3, the steel components are thus meticulously polished by hand.
The desired result is not simply a shiny surface.
The real value of the Sallaz lies in its ability to preserve perfectly defined lines while avoiding the visual distortions that can appear on polished surfaces.
Each reflection then becomes a revealer of the case’s geometry.
Light emphasizes an edge.
It disappears on a surface.
Then returns on another.
A seemingly simple watch thus becomes an exercise in precision.
When handwork resists mass production
This philosophy is one of the foundations of Minase.
The brand claims an attention to detail that cannot be reproduced by standardized industrial production.
This artisanal approach concerns in particular the polishing operations, which require time, mastery and constant human intervention.
In the case of the Mastercraft J3, this philosophy is particularly consistent with the initial project.
Since the watch is based on a deliberately simple architecture, the finishing has to take over from complication.
There is no overloaded dial here, nor a multitude of indications to distract the eye.
The eye settles on the case.
On its edges.
On its surfaces.
On the transitions between the different planes.
It is in these details that Minase seeks to express its identity.
Three Light Sand dials
The Mastercraft J3 is offered with three dials: white, beige and black.
Minase developed them around a single idea: to create a surface capable of playing with light rather than simply displaying a color.
The dials adopt a Light Sand texture that brings a discreet depth.
Depending on the viewing angle and the lighting conditions, the surface seems to evolve subtly.
This textured finish is a particularly interesting choice for such a pared-down watch.
It keeps the dial from looking completely flat and introduces a tactile dimension into a composition that nevertheless favors sobriety.
White offers the most luminous interpretation.
Beige brings more warmth.
Black, for its part, accentuates the contrast between the dial surface and the reading elements.
Three personalities for a single architecture.
Light as an element of the design
The work on the dial does not stop at its texture.
The hands with their sharp edges stand out from the Light Sand surface and create a contrast marked enough to keep an immediate reading of the time.
This precise geometry also contributes to the contemporary character of the J3.
Minase has moreover applied a blue luminescent material to the hands and the indexes.
Light then becomes an integral part of the experience.
In the dark, the watch retains its own visual identity while remaining perfectly functional.
This choice of blue echoes a certain Japanese tradition of chromatic detail, but above all brings a discreet signature to this new creation.
For the first time, a Japanese movement
The Mastercraft J3 also marks an important evolution for Minase.
For the first time in the brand’s history, a collection is equipped with a Japanese movement.
The J3 thus houses the Miyota 90S5, an automatic caliber produced by Citizen.
Launched in 2019, this movement has become a widely used reference in contemporary mechanical watchmaking thanks to a proven architecture and an accessible positioning.
It runs at a frequency of 4 Hz, or 28,800 vibrations per hour, and has 24 jewels.
Its power reserve reaches about 42 hours.
This choice deserves to be highlighted.
Minase is a Japanese brand that has always emphasized its artisanal know-how and its ability to work the components of its watches with great precision.
The integration of a Japanese movement therefore reinforces this identity.
The Mastercraft J3 thus becomes a more coherent expression of an assumed Japanese watchmaking, from the work on the case to the mechanical heart.
Mechanics at the service of the essential
The Miyota 90S5 is not a movement meant to attract the eye with spectacular complications.
And that is precisely what matches the philosophy of the J3.
The watch favors essential functions and immediate reading.
It does not seek to multiply indications.
It focuses on the essential: measuring time with precision while highlighting the quality of its outer shell.
This approach recalls the very concept of the original M3.
‘Ultimate simplicity’ is not an absence of work.
On the contrary, it is a way of making each detail more important.
A watch designed to be personalized
The Mastercraft J3 is not limited to its three dial colors.
Minase has developed a quick-change system that makes it easy to change the strap thanks to a One-Touch mechanism.
The J3 can thus receive several types of straps.
Three calfskin straps with a crocodile-look finish are available, to which are added four leather straps and two rubber straps.
The collection can also be fitted with a classic stainless steel bracelet.
This modularity makes it fairly easy to change the personality of the watch.
A leather strap reinforces its dressy character.
Rubber gives it a sportier dimension.
The steel bracelet, for its part, accentuates its versatile and contemporary character.
The additional straps can be purchased separately, giving owners the possibility of evolving their watch over time.
A new gateway into the Minase universe
With the Mastercraft J3, Minase does not seek to disown the collections that made its success.
The brand instead chooses to return to its roots.
The project rests on a finally quite simple idea: take the M3, understand its aesthetic language and make it more contemporary.
The diameter drops below the 38 mm mark.
The thickness goes below 10 mm.
The dial becomes softer and more textured.
The Japanese movement replaces the Swiss calibers previously used in this line.
And the customization possibilities multiply.
The J3 thus appears as a watch capable of introducing the Minase universe to a wider audience without giving up the elements that make the brand’s singularity.
Japanese craftsmanship as identity
The interest of the Mastercraft J3 ultimately lies less in an isolated technical feat than in the coherence of its approach.
Minase does not seek to reproduce the traditional codes of Swiss watchmaking.
The brand claims another way of designing a watch, strongly influenced by Japanese industrial and artisanal culture.
The precision of the surfaces.
The mastery of polishing.
The care given to details.
The restraint of the design.
The search for balanced proportions.
So many elements that make up a distinctive identity.
The Mastercraft J3 is a particularly legible expression of it.
It does not seek to be spectacular.
It simply asks to be observed.
And it is precisely when you come closer that its character appears.
Minase Mastercraft J3: simplicity as an exercise in precision
With the Mastercraft J3, Minase thus revisits an old idea to give it a new dimension.
The M3 had laid the foundations of a minimalist and perfectly balanced aesthetic.
The J3 keeps its spirit but reduces its proportions, refines its silhouette and places it in a more contemporary approach.
Its 37 mm cushion case, its hand-executed Sallaz finishes, its three Light Sand dials and its Miyota 90S5 movement make up a watch that is coherent, accessible and deeply Japanese in its approach.
Above all, it recalls a truth sometimes forgotten in watchmaking: when a watch has no artifice to hide its imperfections, the quality of the work becomes immediately visible.
At Minase, beauty seems to lie precisely there.
In a perfectly drawn edge.
In a reflection without distortion.
In a texture that changes with the light.
In a hand that stands out from the dial just as it should.
In this sum of details that one does not always notice at first glance, but that ends up making all the difference.
A presentation at Genève Watch Days 2026
The Mastercraft J3 will be officially presented at Geneva Watch Days 2026, which will take place from September 2 to 6 at the Beau-Rivage Palace.
The three versions, J3 White, J3 Beige and J3 Black, can be ordered via Minase’s international website.
The first deliveries are announced within about seven to ten days.
An availability that will allow enthusiasts of Japanese watchmaking to discover more directly this new interpretation of the ‘ultimate simplicity’ dear to Minase.
Technical specifications
Minase Mastercraft J3
Collection: Mastercraft J3
References:
J3 White: J3-NBLNWH-SSD
J3 Beige: J3-NGYNBE-SSD
J3 Black: J3-NBKNBK-SSD
Case: stainless steel
Shape: cushion
Diameter: 37 mm
Thickness: 9.9 mm
Crystal: sapphire
Water resistance: 5 ATM
Movement: Miyota 90S5 automatic
Frequency: 28,800 vibrations per hour / 4 Hz
Jewels: 24
Power reserve: about 42 hours
Dials: white, beige and black Light Sand
Luminescence: hands and indexes with blue luminescent material
Straps: crocodile-look calfskin, leather, rubber or stainless steel
Lug width: 18 mm
Change system: One-Touch quick-change
Price before tax:
Watch with steel bracelet: 2,500 USD
Watch with calfskin strap: 2,050 USD
Watch with rubber strap: 2,080 USD
Stainless steel bracelet only: 700 USD
Rubber strap with buckle: 280 USD
Calfskin strap with buckle: 250 USD
Official presentation: Geneva Watch Days 2026, from September 2 to 6, Beau-Rivage Palace
Availability: order via the Minase international website, delivery announced within 7 to 10 days
Frequently asked questions
A new creation from the Japanese manufacture Minase, which returns to the origins of the house by drawing inspiration from the founding M3, in a more compact format. It adopts a 37 mm cushion case and Light Sand textured dials.
For the first time in Minase’s history, a Japanese movement: the Miyota 90S5, automatic, conceived at the service of the essential.
A 37 mm cushion case, more compact than that of the original M3.
A manual polishing technique applied to the case surfaces, characteristic of Minase’s artisanal know-how, which resists mass production.
In three Light Sand textured dials. The Mastercraft J3 was presented at Genève Watch Days 2026.
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