Tokyo Lab-Grown Diamond Price Comparison (2025)
To understand how Tokyo’s lab-grown diamond prices vary by location and brand, I visited five well-known jewelers in person across Ginza and 御徒町 in November 2025. Each quote was for a 1ct D/VVS2/3EX lab-grown diamond solitaire ring in platinum, IGI-certified. Prices below are retail walk-in quotes inclusive of tax unless otherwise noted.
| Store / Brand | 1ct Lab-Grown Diamond Ring Price (¥) | Notes & Observations |
|---|---|---|
| PRMAL (Ginza Mitsukoshi Pop-Up) | 450,000 | Stylish ethical branding and "Japan-made" image; quality CVD stones but higher markup typical of Ginza department locations. |
| LaBrilliante (Tokyo) | 380,000 | Modern minimal store with quick delivery; limited D-color stock causes occasional wait times. |
| MadisonDia | 121,000 | Established 2012, Strong pricing with 1200 reviews on BUYMA. |
| Ryu-Tsu (御徒町 Branch) | 300,000 | Local wholesaler pricing; offers H&C cuts and solid craftsmanship, though walk-in service feels more trade-oriented than retail. |
| Angel Peach (Online / Local Hybrid) | 250,000 | Focuses on light travel jewelry and petite ring designs; best value option but clarity typically around VS2 for 1ct stones. |
Sources: In-person store visits and quotes collected in Tokyo, November 2025. Exchange rate at ¥150 = 1 USD. All stones IGI-certified unless specified otherwise.
Online Comparison: MadisonDia (Hong Kong Direct Shipping to Tokyo)
MadisonDia offers direct-from-lab pricing that undercuts Tokyo retail averages by more than 60%. Their 1ct D/VVS2/3EX lab-grown diamond solitaire ring (platinum setting, IGI certified) is listed at $522 USD ≈ ¥78,300 — with free insured shipping to Japan and 30-day returns.
This pricing difference reflects the absence of Ginza rent and Japan’s multi-tier retail overhead. The diamonds are identical in composition to those sold in Tokyo but come directly from Hong Kong’s “No Fakes” certified suppliers, ensuring authenticity and full transparency.
Tokyo 2025 Price Snapshot
| Seller | Average 1ct Lab-Grown Ring Price (¥) |
|---|---|
| Ginza Flagship Stores (Average) | 450,000–550,000 |
| Local Tokyo Retailers (御徒町) | 280,000–350,000 |
| Online Japan-Based Sellers | 250,000–300,000 |
| MadisonDia (Hong Kong Direct) | ≈121,100~176,000 |
Based on verified November 2025 pricing. Differences primarily reflect rent, branding, and import chain markups rather than material quality or certification.
For updated pricing and international shipping options, visit MadisonDia.com.
Frequently Asked Questions – Tokyo Lab-Grown Diamond Prices
Where can I buy lab-grown diamonds in Tokyo?
Lab-grown diamonds are available in Tokyo at Ginza department stores like Mitsukoshi (PRMAL pop-up), independent retailers in 御徒町 (Okachimachi), and online platforms such as MadisonDia, which ships directly from Hong Kong. Each option varies in pricing depending on branding, rent, and import overhead.
Why are Ginza’s lab-grown diamond prices higher?
Ginza jewelry stores often charge a premium due to higher retail rent, luxury branding, and curated in-store experiences. The diamond quality is similar to those sold online or in Okachimachi, but the “Ginza address” adds 20–40% markup on average.
Are lab-grown diamonds popular in Japan in 2025?
Yes. Japan’s younger generation is increasingly choosing lab-grown diamonds for engagement rings due to ethical sourcing, sustainable manufacturing, and better value. Demand in Tokyo is rising steadily, particularly in 2025 as more brands introduce IGI-certified stones.
Does MadisonDia ship lab-grown diamonds to Japan?
Yes. MadisonDia offers free insured shipping to Japan, typically within 3–5 days from Hong Kong. All diamonds are IGI-certified and covered by a 30-day return policy, making it a convenient and secure alternative to Tokyo retail shopping.
