Latest finds
Recently collected
Seiko 5 Sports Speed-Timer 6139 Green Gradient
This is a Seiko 5 Sports Speed-Timer 6139-8050 from around 1974, one of the world’s first automatic chronographs. It has an emerald-to-forest green gradient dial, a silver 30-minute counter, an orange chrono hand, and a fresh overhaul.
Seiko Brightz “Bombay Sapphire” Limited Edition
This is a Seiko Brightz “Bombay Sapphire” SAGA155, a numbered limited edition of 300 from Seiko’s collaboration with Bacardi. It has a sunburst blue dial with gold accents, a retrograde day indicator set with seven sapphires, a world-time bezel, and a solar radio-controlled movement.
Casio G-Shock MR-G Frogman MRG-1100
This is a Casio G-Shock MR-G Frogman MRG-1100 from around 1999–2000. It has a titanium case and bracelet, a blue anodised bezel ring, the engraved Frogman caseback, and Diver’s 200m dive functions. Made in Japan, and one of the first all-metal Frogmen.
WHAT WE HUNT
Watches worth collecting.
01/ Vintage Seiko
Divers, chronographs, Grand Quartz, King Quartz and other distinctive references from Seiko's extensive catalog.
02/ Grand Seiko & King Seiko
Mechanical and quartz watches representing some of the finest eras of Japanese watchmaking.
03/ Citizen
From vintage mechanical and quartz watches to distinctive JDM models and modern collector pieces.
04/ The unexpected
The unusual, the overlooked and the watches we couldn't leave behind.
The Ojisan standard
Not every watch is worth collecting. We seek out the ones that are.
Distinctive design, meaningful history, unusual references, collector significance—or simply something you don’t see every day. Every watch is individually assessed and thoughtfully selected.
Rooted in Japan
Found there.
Collected here.
Japan's watchmaking history extends far beyond the familiar names and celebrated references. We search across Japan for watches with character, history and a reason to be collected—from recognized classics to remarkable pieces that have been overlooked along the way.
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Stories worth keeping
The Seiko 7548, and why divers stopped being tools
A quartz diver that outlived its own category, and what to check before buying one.
Understanding Seiko Grand Quartz
Reference families, caliber differences and the dials that are quietly disappearing.
King Seiko or Grand Seiko: the case for the other one
Two houses, one rivalry, and the references collectors keep overlooking.
The archive
Previously collected
Every watch that passes through Ojisan becomes part of the record. Its photographs, reference details and story remain preserved in our archive—a growing resource for collectors and enthusiasts.