Seiko Samurai: The Angular Diver

The Seiko Samurai's name comes from a visual observation: the angular lug design, viewed from the side, recalls the sharp geometry of a samurai's sword. It is a community nickname — Seiko's own marketing designated these watches under their reference numbers without attaching a name — but it captured something real about the design's character. Where the Turtle is soft, the Samurai is hard. Where the Monster is textured, the Samurai is precise. It was produced from 2004 in titanium, went silent for nearly a decade, returned in 2016 in stainless steel at a larger diameter, gained a ceramic bezel upgrade in 2020, and was redesigned to a smaller, more refined specification in 2024. It is a watch that has evolved considerably while maintaining the angular identity that earned it its name.

The Original Samurai — 2004

The first-generation Samurai was introduced in 2004 as a Japan Domestic Market product, initially in titanium:

Specifications — First Generation

The Calibre 7S25 is the 7S26 without a day display — sharing the no-hacking, no-manual-wind characteristics of its sibling. The titanium case gave the original Samurai a lightness on the wrist that differentiated it from the heavier steel dive watches of the same era. The angular lug construction was the defining design element: the lugs cut away from the case in a triangular profile that suggested something edged and precise.

The Samurai name, like Monster and Turtle, was assigned by the community. It is now so widely used that Seiko itself has adopted it in press releases for subsequent generations.

The Hiatus — 2008 to 2017

Production of the Samurai ceased around 2008 . The watch was absent from the Seiko catalogue for approximately nine years — a gap long enough that its return in 2017 was treated as a genuine revival rather than a model update.

The reasons for the hiatus are not publicly documented. The period coincided with the broader Seiko portfolio rationalisation that accompanied the Prospex line's development and the quartz crisis recovery strategies that dominated the 2000s and early 2010s. The Samurai returned when the Prospex collection was being actively expanded and the demand for character-driven mechanical divers at accessible prices was evident.

The 2017 Revival

In 2017 , the Samurai returned — in stainless steel, at a larger diameter, with a significantly upgraded movement.

Specifications — 2017 Generation

The 4R35 upgrade addressed the first generation's no-hacking, no-manual-wind limitation. The stainless steel case added weight relative to the titanium original but placed the 2017 Samurai at a more accessible price point. At 43.8mm, the 2017 Samurai was larger than the original 42mm — a common trend across watch category revivals in the 2010s — but the angular proportions handled the additional diameter without looking bloated.

2017 References

The revival also included collaboration and conservation editions alongside the core production references. The PADI partnership gave the Samurai an institutional association with professional diving instruction; the Save the Ocean edition linked it to Seiko's broader marine conservation messaging.

King Samurai — 2020

In August 2020 , Seiko introduced the King Samurai — a premium tier within the Samurai line, distinguished by two significant specification upgrades:

1. Ceramic bezel insert — replacing the aluminium insert of the standard Samurai
2. Sapphire crystal with date magnification window

King Samurai Specifications

Key King Samurai References

The ceramic bezel represents a meaningful materials upgrade: ceramic is harder than aluminium (scratch-resistant enough that the graduation markings retain their precision over years of wear), and the glossy black ceramic gives the King Samurai a more refined surface than the anodised aluminium of the standard variant. The sapphire crystal eliminates the scratch vulnerability of mineral crystal. The King Samurai costs approximately 40–50% more than the standard 2017 Samurai — a premium justified by tangible material improvements rather than cosmetic differences.

The 2024 Redesign — Smaller, Sharper

For the Samurai's 20th anniversary in 2024, Seiko fully redesigned the watch — and moved against the trend, making it smaller rather than larger:

The 2024 redesign was widely noted for returning the Samurai to proportions more consistent with its 2004 origins — the 42mm original had been superseded by the 43.8mm 2017 version, and the 2024 revision at 41.7mm brought it closer to that original footprint while refining the lug geometry.

2024 References

Frequently Asked Questions

Why is it called the Samurai?
Community nickname derived from the angular lug shape, which viewed in profile recalls the blade geometry of a samurai sword. Not official Seiko marketing, though Seiko has adopted the name in press communications for the 2017 and later generations.

What calibre does the Seiko Samurai use?
The 2017 revival and subsequent generations use Calibre 4R35: 23 jewels, 21,600 vph, approximately 41-hour power reserve, with hacking and manual winding. The original 2004 generation used the 7S25 (no hacking, no manual wind).

What is the King Samurai?
A premium variant introduced in August 2020, distinguishable by a ceramic bezel insert and sapphire crystal (vs. aluminium bezel and mineral crystal on the standard 2017 Samurai). Case: 44mm. Movement: 4R35. Priced at USD 595–625.

Is the 2024 Samurai smaller than the 2017 version?
Yes. The 2024 redesign reduced the case from 43.8mm to 41.7mm, the thickness from ~13.4mm to 12.3mm, and the lug width from 22mm to 20mm — moving back toward the original 2004 Samurai's proportions.

Related Articles

• Seiko Monster: Teeth, Texture, and Tool-Watch Character
• Seiko Turtle: The Cushion-Case Diver
• Seiko Sumo: The Barrel-Case Diver
• Seiko Prospex: Professional Specifications
• Seiko Calibres and Movements