SEIKO × nano・universe Watches from Japan
Discover the SEIKO × nano・universe collection, a series of compact Japanese dress watches created by SEIKO under the supervision of Japanese fashion retailer nano・universe.
The collection brings together classic rectangular cases, refined Roman numeral dials, slim proportions and carefully coordinated bracelets or leather straps. These watches are designed to work as subtle fashion accents while retaining the dependable everyday functionality associated with SEIKO.
New HFJ Solar Models
The latest HFJ series introduces solar-powered models such as the HFJ001P, HFJ002P, HFJ003P and HFJ004P. Each model features a slim rectangular case and SEIKO’s V115 solar quartz movement, which converts light into electrical energy and provides approximately 12 months of operation when fully charged.
Choose from silver-tone and gold-tone bracelet models or leather-strap versions in brown and black. The compact case dimensions and clean two-hand displays create an elegant vintage-inspired appearance without sacrificing everyday convenience.
Classic SSEH Quartz Watches
The collection also includes selected SSEH quartz models, known internationally for their petite rectangular profiles, traditional dial details and versatile dress-watch styling.
Compare models such as the SSEH015, SSEH016, SSEH017 and SSEH018, with variations in dial color, case finish and strap design. The battery-powered SSEH series remains an appealing choice for buyers who prefer a traditional compact quartz dress watch.
How to Choose Your SEIKO × nano・universe Watch
- Choose an HFJ model if you want solar-powered convenience and an exceptionally slim rectangular design.
- Choose an SSEH model if you prefer the proportions and styling of the earlier battery-powered quartz series.
- Choose a metal bracelet for a polished jewelry-inspired appearance.
- Choose a leather strap for a softer and more traditional dress-watch look.
Although SEIKO officially categorizes many of these references as women’s watches, their compact proportions may also appeal to anyone who enjoys smaller rectangular watches and vintage-inspired styling. Always review the dimensions and compatible wrist size listed on each product page before purchasing.
Authentic Japanese Domestic Market Models
Japan Heartful Store offers authentic SEIKO × nano・universe watches sourced from Japan. Each order is carefully packed and shipped directly from Japan. Product availability may vary because certain models are distributed through selected sales channels and can be difficult to find outside the Japanese market.
Explore the collection below and compare the latest solar-powered HFJ models with the classic SSEH quartz series.
















































