Kurono Tokyo
Niji (Rainbow Dial)
Ref. Niji
2022–present · 38mm · caliber NH35A base (Seiko/TMI): automatic, 21,600bph, 41h PR, 24j; Asaoka-regulated
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Entry-tier movement
Versatile size: fits most wrists (6–7.5 in / 15–19 cm)
38 mm case. The sweet spot for the broadest range of wrist sizes. Neither too dainty nor too bold.
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Authentication
Niji rainbow-dial piece: enamel coloring is the primary authenticity indicator; verify against Kurono production images.
Known issues in the market
- Rainbow dials are appealing to casual buyers who may not verify serial numbers.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Rainbow gradient accuracy | Gradient matches Kurono Niji production images; transitions are smooth and consistent | Gradient that differs from official images, color that appears printed rather than enameled, any surface texture inconsistency |
| caseback | Niji designation and serial | Niji reference on caseback, serial verifiable with Kurono | Wrong variant designation, unverifiable serial |
Common legitimate replacements
- Strap replacements common.
Expert resources: Kurono Tokyo serial verification is the definitive step.
Authentication guide
Last reviewed June 2026
The Niji features a rainbow-spectrum dial achieved through hand lacquering in multiple color transitions. The color gradient is the defining authentication point.
Sources: Kurono Tokyo official registry.
