Lab-grown diamond supplier for Japan
Japanese buyers place great weight on cut quality and consistency. We supply certified lab-grown diamonds, calibrated melee and fancy colours to wholesalers in Okachimachi, manufacturers in Kofu and retailers across Japan.
Trade supply. For jewellers, wholesalers, manufacturers and brands. Orders from US$2,000, quoted within one business day.
Who we supply in Japan
We work with Japanese businesses that resell, set or manufacture. Some of the places our buyers trade from:
- Tokyo — Okachimachi
- Kofu (Yamanashi)
- Osaka
- Kobe
Okachimachi wholesalers
Consistent certified goods for distribution.
Kofu manufacturers
Calibrated melee and side stones.
Retailers
High-cut-grade centre stones for bridal.
What Japanese buyers ask for
The specifications we are asked for most often from Japan.
- Excellent-cut rounds
- Calibrated melee with tight tolerance
- Hearts & arrows goods
- Fancy pink
Disclosure and compliance
Lab-grown diamonds should be clearly identified in Japan. Our documentation describes every stone as laboratory-grown.
Shipping and paperwork
Insured valuables courier with complete documentation. Consumption tax and any duty are settled by the importer of record.
General guidance for trade buyers, not legal or tax advice. Check import rules with your customs broker.
Available to ship to Japan now
A selection from today's stock, with trade prices. Tap Enquire to reserve.
Ordering from Japan, step by step
Send the spec
By form or WhatsApp. Include quantity and the lab you prefer.
Review the shortlist
Photos, video, reports and a trade price in U.S. dollars.
Pay the invoice
Bank transfer against a pro-forma invoice.
Receive insured
Valuables courier to your door in Japan, with full paperwork.
Free for trade buyers
Get today's full stock list
All 2,423 lab-grown stones in one spreadsheet: shape, carat, colour, clarity, report number and trade price. Opens in Excel or Google Sheets. Updated daily.
Planning a large or repeat order?
Parcels, matched layouts, monthly supply programmes and private-label lines. Send the brief and our trade desk replies with a costed proposal, matching stones with video and reports, and a delivery date — before you pay anything.
- Pro-forma invoice, bank transfer
- Insured door-to-door delivery
- Specs kept on file for reorders
Questions from Japanese buyers
Short answers to what buyers ask before their first order.
Not covered here? Ask on WhatsApp or send an enquiry.
Do you supply lab-grown diamonds to Japan?
Yes, to wholesalers, manufacturers and retailers, insured and fully documented.
Can you supply hearts & arrows goods?
Yes, on selected round brilliants. Ask for current availability.
Is there a minimum order?
Yes. Trade orders of US$2,000 or more only.
How long does delivery to Japan take?
Stock goods usually ship within a few business days of payment and arrive a few business days later by insured valuables courier. We confirm dates with the invoice.
Can I see the stones before paying?
Yes. We send photos, 360° video and grading reports for every shortlisted stone, so you can decide without travelling.
Do you sell to consumers in Japan?
No. We are a trade-only supplier to jewellers, wholesalers, manufacturers and brands, and we never contact your customers.
Get a quote for Japan
Send the spec and the volume. Our trade desk replies with available stones, photos, video and grading reports, usually within one business day.
- You send the spec. Shape, size, colour, clarity, quantity, or a design brief.
- We shortlist. Matching stones or a costed proposal, with media and reports.
- You confirm. Invoice, payment, then insured delivery to your door.
Trade supply. For jewellers, wholesalers, manufacturers and brands. Orders from US$2,000, quoted within one business day.
