An Unprecedented Challenge:
Marking One Million Hours
Development began roughly three years ago in response to Shohei Ohtani’s own reflection:
Click, to see the large size. ▶ BIG FOTO 
“How much longer can I keep going as a baseball player?" The watch’s name: “Seiko Star Time.” Inspired by the stars that move through the vast flow of eternity, this mechanical watch was created to express the time Ohtani has already accumulated—and the time he will continue to build from here. At its heart is a mechanism designed to count one million hours—a span of approximately 114 years.
With the full force of Seiko’s technology and expertise brought together, an unprecedented and truly monumental challenge began.
Model Concept
The stars move so slowly as to be almost imperceptible,
and yet they continue their course with unwavering certainty.
That motion echoes the time Shohei Ohtani has built
through the steady accumulation of daily effort.
The Seiko Star Time is a special model that channels
the movement of the stars across the night sky
and the path of Ohtani’s ongoing challenge.
ROTATING DISCS
The numbers on the five rotating discs indicate the accumulated time in hours as they pass beneath the red line on the inner surface of the box-shaped sapphire crystal. Additionally, the central disc displays the current time in a 24-hour format. A diamond is set on each disc to indicate when it has completed a full rotation. There is also a diamond at the center of the discs.
Click, to see the large size. ▶ BIG FOTO 
The diamond at the center of the discs represents the North Star—an unwavering goal whose position never changes. It expresses Shohei Ohtani’s determination to move forward without hesitation, steadfastly pursuing that goal. The arcs extending from the rotating discs toward the ceramic bezel and the silicone strap represent the trajectories of the stars.
CASE
Lines evoking the trajectories of the stars are also applied to the sides of the High-Intensity titanium case, while the top of the crown is set with a blue sapphire.
An Unprecedented Challenge
The Story Behind the Creation of a Timepiece
That Tracks One Million Hours.
How was this special watch born of Shohei Ohtani’s own reflections and aspirations?
How did Seiko’s project development members confront unprecedented challenges to create a mechanism designed to track one million hours?
From concept to design, from manufacturing to the moment it was delivered to Shohei Ohtani.
Follow the journey of the Seiko Star Time — from the first idea to its completion — in this documentary film.
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The Seiko Star Time, a one-of-a-kind wristwatch capable of displaying up to one million hours, is presented to brand ambassador Shohei Ohtani.
Major League Baseball player Shohei Ohtani has been a Seiko brand ambassador in Japan for 10 years. In recognition of this milestone, the company recently presented Mr. Ohtani with a one-of-a-kind mechanical wristwatch whose development began approximately three years ago, in response to the star’s reflection on his time in baseball.
Click, to see the large size. ▶ BIG FOTO 
Mr. Ohtani asked: “How much more time do I have in my baseball career?” Having kept the time for countless people around the world since creating Japan’s first wristwatch in 1913, Seiko is steeped in marking life’s moments through the steady accumulation of time. It was in this spirit that the company embarked on an unprecedented project to develop a wristwatch with a display capable of tracking up to one million hours, or just over 114 years.
Inspired by stars traversing the night sky
The timepiece features an innovative design with five layered discs. The discs display cumulative time within their respective ranges: 24 hours, 1,000 hours, 10,000 hours, 100,000 hours, and 1,000,000 hours, while the innermost 24-hour disc also indicates the current time of day. At present, no wristwatch other than the Seiko Star Time can measure and display up to one million hours with five disc indicators.* As the discs move, their motion is imperceptible to the naked eye. Yet, much like the time and effort accumulated by Mr. Ohtani, each progresses steadily over time. In this way, the diamond-set discs mirror the motion of the stars, which, though gradual, leave a lasting trace across the night sky. Inspired by this concept, the name Seiko Star Time was chosen for this special creation.
*As of July 2026, based on Seiko Watch Corporation’s research.
The watch was personally presented to Shohei Ohtani
This year, after approximately three years of development, the watch was presented to Shohei Ohtani by Seiko Watch Corporation Chairman, CEO, and CCO Shinji Hattori.
Shohei Ohtani commented:
“I wanted to wear something that reflects the time I’ve put in so far and how much further I can go. Seeing the watch in person, it’s exactly as I had imagined, and I think it’s truly wonderful. Thank you very much.”
Click, to see the large size. ▶ BIG FOTO 
Shinji Hattori commented:
“We are truly delighted that Mr. Ohtani is pleased with the creation. The members of the development team, who devoted their full efforts in response to his passion, also feel that their work has been rewarded. The creation of a wristwatch with such outstanding cumulative timekeeping performance represents a major milestone for us, and we are proud to have contributed to the further development of watchmaking culture."
A wristwatch unlike any other
The five discs are significantly thicker than conventional dials and hands, presenting a major design challenge. To minimize overall thickness, a newly developed structure, created exclusively for this model, was adopted. This approach required not only close integration between the designs of the discs and the movement, but also modifications to the movement’s configuration and the establishment of new assembly methods. As a result, a solution was realized through close collaboration between the design and manufacturing teams.
Click, to see the large size. ▶ BIG FOTO 
Throughout the project, repeated discussions were held between Mr. Ohtani and the development team. During this process, the idea of setting a diamond into each rotating disc was adopted, resulting in a highly distinctive design. Additionally, the silicone strap was designed for enhanced wearability and produced in a custom length tailored to Mr. Ohtani’s wrist. The result combines a comfortable fit with excellent practicality.
About Shohei Ohtani
Shohei Ohtani
Right-handed pitcher / Left-handed hitter
Born in Iwate Prefecture, Japan, in 1994
Selected first overall in the 2012 NPB Draft and joined the Hokkaido Nippon-Ham Fighters. Gained attention for his two-way role as both pitcher and hitter.
- 2016: Led the Fighters to the Japan Series championship and was named Pacific League Most Valuable Player.
- 2018: Joined the Los Angeles Angels and was named American League Rookie of the Year.
- 2021: Recorded 46 home runs and nine pitching wins, earning the American League Most Valuable Player award.
- 2023: Became the first player in MLB history to record double-digit pitching wins and double-digit home runs in consecutive seasons, winning his second unanimous American League MVP.
- 2024: Signed with the Los Angeles Dodgers. Became the first MLB player to record 50 home runs and 50 stolen bases in a single season, won the World Series, and was named National League Most Valuable Player.
- 2025: Made 14 pitching appearances and hit a career-high 55 home runs, helping the Dodgers win a second consecutive World Series. Earned unanimous MVP honors for the third consecutive year and fourth time overall in Major League Baseball.
Specifications:
High-Intensity Titanium case and clasp
Box-shaped sapphire crystal with anti-reflective coating on the inner surface
Water resistance: 10 bar
Diameter: 41.8mm, Thickness: 17.4mm
Silicone strap
Note: This is a one-of-a-kind model and is not for sale.
Edition - Unique Piece
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Press releases - 2026
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SEIKO WATCH CORPORATION
Mr Noboru Miyadera
2-8-10, Toranomon, Minato-ku,
Tokyo 105-8467
Japan
Telephone +81 3 6739 2150
Telefax +81 3 6739 2071
seiko-pr@seiko-watch.co.jp
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www.SeikoWatches.com
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