KURONO Tokyo – COMPLICATIONS ‘Structure’ Chronograph S1 Editions
A New Style Of Tool Watch
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Kurono Tokyo presents the ‘Structure’ Chronograph S1, representing Hajime Asaoka’s vision for a new style of tool watch — where purposeful design meets uncompromising functionality.
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With the Structure series, Hajime Asaoka strips away the superfluous to focus on the purity of product design. The Chronograph S1 embodies this approach to Functional Elegance, housing the true utility of a tool watch within a slightly larger 40mm case.
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"How should a chronograph be designed as a true, uncompromising tool watch? The Kurono ‘Structure’ Chronograph S1 is my definitive answer, as a product designer, to what a tool chronograph should truly be." - Hajime Asaoka.
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"Until now, the Kurono Tokyo watches I have created were designed from my dual perspective as an independent watchmaker and a product designer. Their designs were rooted in the formal beauty cultivated over the long history of watchmaking, while incorporating a modern touch suited to contemporary timepieces. The new Kurono Chronograph S1 raises the purity of product design even further, packing tool-watch functionality into a slightly larger 40mm case."
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"The dial utilizes a unique four-layer structure that minimizes the gap between each hand and index as much as possible to maximize legibility. In particular, the chronograph hand has almost zero parallax relative to the indices, allowing it to fully demonstrate the accuracy of a high-beat chronograph. Additionally, the subdials have been enlarged to their utmost limit, and the counter hands feature a matching fluorescent orange color that resonates with the chronograph hand."
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"My design ethos for this project can be distilled into two words: Functional Elegance." - Hajime Asaoka.
Availability and deliveries
Chronograph S1 will be available online worldwide, and for in-person viewing at the Shanghai and Aoyama salons.
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Limited production and will not be repeated. Expected deliveries from mid-December 2026 onwards.
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TECHNICAL SPECIFICATIONS
Model: THE COMPLICATIONS ‘Structure’ Chronograph S1 Editions
Click , to see the large size. ▶ BIG FOTO
Click , to see the large size. ▶ BIG FOTO
Click , to see the large size. ▶ BIG FOTO
Material: Stainless steel (316L, high-polished)
Diameter: 40 mm
Thickness: 13.15mm incl. sapphire
Lug-to-lug: 50.2 mm
Glass: Sapphire box crystal
Water-resistant to 30 meters
Dial
White, Teal or Salmon
Movement
Calibre NE86PWT
Automatic winding
Number of jewels: 34
Frequency: 28,800 vph
Power reserve approx. 45 hours
Functions
Hours, minutes, seconds, chronograph
Strap
Rubber strap
Lug width: 22 mm
MSRP:🔴Price: USD 3'690 (excl. taxes)💰
🇯🇵 Made in Japan 🇯🇵
🔰 Limited production and will not be repeated
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Press Release - 2026
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