Hajime Asaoka Tsunami Édition Blanche: A Collector's Guide to the Refined Independent

In the world of independent watchmaking, few names command as much respect as Hajime Asaoka. A self-taught watchmaker and member of the Académie Horlogère des Créateurs Indépendants (AHCI), Asaoka produces a handful of watches each year from his Tokyo workshop. Among his creations, the Tsunami stands out as his signature piece—a time-only watch that embodies his philosophy of personal, artisanal watchmaking. The latest iteration, the Tsunami Édition Blanche, represents a subtle evolution of this modern classic, offering a quieter, more refined expression of the original design.

The Maker: Hajime Asaoka

Hajime Asaoka's path to watchmaking is unconventional. With a background in product design, he taught himself the craft through books, machines, and relentless iteration. Today, he is one of the few independent watchmakers who builds watches as a craftsman rather than a brand. Each piece is largely made in-house, with output often limited to just a few watches per year. Asaoka is also the founder of Precision Watch Tokyo (PWT), an umbrella for more accessible brands like Kurono Tokyo and Otsuka Lotec, but his own name is reserved for his most exceptional creations. The Tsunami, in particular, is the purest expression of his vision.

The Tsunami Édition Blanche: An Overview

The Tsunami Édition Blanche is a refined take on the model first launched around 2013. It retains the classic proportions and restrained aesthetic of its predecessors but introduces several updates that make it feel more resolved and contemporary. The watch features a 37mm stainless steel case, a multi-part white dial with Art Deco influences, and an in-house manual-winding movement with an oversized balance wheel. Limited in number and already sold out, it is a piece that exemplifies Asaoka's dedication to handcraftsmanship and his unique approach to horology.

Case and Design

At first glance, the Tsunami Édition Blanche may appear modest. Its 37mm diameter and slim profile make it highly wearable, akin to a high-end Japanese Calatrava. However, the case is far from ordinary. It features smooth, polished and brushed surfaces, a stepped bezel, slender lugs, and a fluted crown. In this updated version, the design feels more refined: edges are sharper, transitions cleaner, and proportions more balanced. The watch sits comfortably on the wrist, almost disappearing in thickness, yet its clarity of form ensures a satisfying presence. It is not a sports watch, nor strictly a formal dress piece; rather, it is a versatile daily wearer that demands a certain degree of sophistication from its owner.

Dial: Art Deco Refinement

The Tsunami has always had a strong graphic identity, with Art Deco influences evident in its sector layouts and contrasting tones. The Édition Blanche keeps this foundation but offers a more subdued execution. The white dial is cleaner and better integrated, with elements like the minutes track, chapter ring, and snailed sub-seconds feeling less segmented. The contrast between the central striped section, the chapter ring with Breguet-style numerals, and the sub-seconds display is handled with subtlety, allowing light to play across the surface and reveal details rather than relying on bold color separation.

Asaoka's attention to detail extends to the dial's material. He specifically researched and selected the pigment at an elemental level to ensure precise coloration and long-lasting durability. The white pigment is mixed into resin to create the dial coating, and a higher proportion of pigment than usual was used, resulting in a particularly solid white that resists discoloration over time. The typography is also distinctly Asaoka: each numeral is hand-lettered in his original typeface, drawing on his experience in calligraphy. The syringe hands retain their sculptural quality, catching light for optimal legibility. Overall, the dial achieves a sense of balance that is both calm and captivating.

Movement: Mechanical Art

Turning the watch over reveals the in-house manual-winding movement, where Asaoka's watchmaking philosophy is most tangible. The oversized balance wheel, measuring 15mm in diameter, dominates the view, beating at a slow 2.5Hz (18,000 vibrations per hour). This slow pace allows the owner to observe the back-and-forth motion, a meditative experience. Adjacent to the balance wheel is the large, highly decorated gold wheel with curved spokes, known as the Tako wheel (tako means octopus in Japanese). The architecture is open and deliberate, with bridges shaped to frame rather than hide the mechanics. Finishing is entirely hand-executed, with visible striping, anglage, and perlage. While it may not aim for the hyper-polished perfection of traditional Swiss masters, it has a clarity and honesty that is equally compelling—every component exists for a reason, and that reason is visible.

Wearability and Collectibility

Despite its rarity and craftsmanship, the Tsunami has always been a watch to wear, and the Édition Blanche is no exception. Its size, elegant profile, and restrained design make it suitable for daily use. It doesn't demand special occasions; it invites regular companionship. This is one of the most surprising aspects of Asaoka's work: for a piece made in such limited numbers by hand, it feels remarkably approachable.

The price, however, is USD 30,000, which places it firmly in the realm of high-end independent watchmaking. But beyond the object itself, owning a Tsunami is about the connection to its maker. You are buying into a person's work—a rare and emotional component that only independent watchmaking can offer. This edition is already sold out, underscoring its desirability among collectors.

Technical Specifications

• Case: 37mm diameter, stainless steel, fully polished with stepped bezel
• Crystal: Sapphire front and back
• Dial: Multi-part white base with Art Deco-inspired layout, stylized Breguet numerals, striped central section, chapter ring, snailed sub-seconds
• Hands: Polished steel syringe hands
• Movement: In-house manual-winding calibre, oversized balance wheel, approx. 40h power reserve, 18,000 vph (2.5Hz), hand-finished bridges and plates with anglage and striping
• Functions: Hours, minutes, small seconds
• Strap: Leather strap with handmade steel pin buckle
• Availability: Sold out
• Price: USD 30,000

Conclusion

The Hajime Asaoka Tsunami Édition Blanche is a testament to the beauty of subtle evolution. It takes a modern classic and refines it further, resulting in a watch that is quieter, more refined, and ultimately more enduring. For collectors, it represents a rare opportunity to own a piece of personal watchmaking—a direct connection to the hands and mind of a master craftsman. While it may be sold out, its legacy continues to inspire appreciation for the art of independent horology.