There are athlete endorsements, and then there are partnerships that actually make sense. When Seiko first signed Shohei Ohtani as a brand ambassador during his MLB rookie year in 2018, it was an early bet on a player whose ceiling wasn’t yet fully visible to the rest of the world. Eight years, four unanimous MVP awards, and back-to-back World Series titles later, that bet looks extraordinarily well-placed. Ohtani now earns more endorsement money than any athlete in the world, and Seiko has been along for the ride since almost the very beginning.

Now the relationship between Shohei Ohtani and the Seiko group is expanding in two significant directions at once. Grand Seiko has announced a formal global partnership with Ohtani built around the “Grand Moments Project” — a collaboration rooted in shared values of precision, sincerity, and the meaning of time well spent. Simultaneously, Seiko has unveiled two limited-edition Prospex dive watches honoring his back-to-back World Series victories, releasing exclusively in Japan on April 24, 2026. Together, these announcements paint a picture of a brand-athlete relationship that has grown well beyond a simple sponsorship deal.

The Grand Seiko Global Partnership Explained

The Grand Seiko side of this announcement is the more conceptual of the two, and it’s worth understanding what it actually represents. The partnership is centered on the “Grand Moments Project,” a collaboration built on a shared philosophy of approaching every moment with sincerity and deep respect for the value of time.

It’s the kind of brand language that can easily tip into corporate vagueness, but Ohtani’s own words give it some grounding. He said that carrying forward a part of Grand Seiko’s heritage, shaped through decades of dedication, is something he deeply values, and that feeling that legacy while wearing the watch brings him genuine joy. For a man who has dedicated his career to the disciplined accumulation of marginal gains, the philosophy isn’t much of a stretch.

The Grand Moments Project launches on April 1, 2026, and marks a meaningful step up from Ohtani’s existing Seiko ambassador role. Where previous collaborations sat under the broader Seiko umbrella, this one places him at the centre of Grand Seiko’s global storytelling — a brand that operates at the higher end of Japanese horology and takes its identity very seriously.

Two Limited-Edition Watches That Earn Their Details

On the Seiko Prospex side, the releases are more concrete, and for watch enthusiasts, this is very exciting. The SBDC222 and SBDC224 are both built on the Seiko 1965 Diver’s Heritage platform, arriving in gray and Dodger blue dial colorways, respectively, each pulled directly from the Dodgers’ visiting uniform palette. This is already the third time Seiko has returned to this platform for an Ohtani collaboration, following the SBDC191 in 2023 and a 1968-based GMT pair in late 2024.

The gold accents are the design detail that ties everything together. They run across the partially gold-plated bezel, crown, hands, and indices — referencing the MLB logo patch awarded exclusively to players who have won MVP, Cy Young, or Rookie of the Year honours in the prior season. Ohtani has worn that patch. The watch wears it too.

Beyond the symbolism, the personalization is thorough: the crown is engraved with “17” for his jersey number, the clasp carries his etched signature alongside a six-stage micro-adjustment system, and the caseback reads “SHOHEI OHTANI LIMITED EDITION” with an individual serial number. Buyers also receive a special presentation box bearing Ohtani’s signature. Inside, the Caliber 6R55 automatic runs with a 72-hour power reserve, hacking seconds, and manual wind capability.

What You Need to Know Before April 24

The practical details matter here, particularly for anyone outside Japan. Both the SBDC222 and SBDC224 are strictly limited to 1,700 pieces each, a direct nod to jersey number 17, and are priced at ¥286,000, roughly $1,832 USD. They will be released exclusively through Seiko Global Brand Core Shops and select authorized dealers in Japan on April 24, 2026. That Japan-only distribution is a real barrier for international buyers, and it’s worth being clear-eyed about that before getting too attached.

For those who can navigate the regional restrictions, these are watches that justify their price and their story. The Shohei Ohtani and Seiko collaboration has never felt like a name slapped on a generic product. Each release has been considered, the design references have been earned rather than invented, and the platform itself is genuinely strong. Whether you’re a watch collector, a baseball fan, or someone sitting in the middle of that very specific Venn diagram, the April 24 window is one worth marking.

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Featured image: Chung Sung-Jun/Getty Images/PR Times

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