Buy MadisonDia Lab Grown Diamonds in Japan — PayPay & Buyma | Same Price
MadisonDia is a Hong Kong lab-grown diamond fine jewellery house, trusted by customers across Japan — from Tokyo and Osaka to Nagoya and beyond. You can order with us in two ways: directly here on our website, or through our official Buyma shop. Whichever you choose, you receive the same diamond, the same IGI certificate, and the same MadisonDia price.
Buying MadisonDia from Japan — the short version
- Fine jewellery shipped from Hong Kong to anywhere in Japan.
- Import customs duty is covered by MadisonDia for Japan-bound orders.
- Prefer PayPay, convenience-store payment or pay-later? Order via Buyma.
- Buyma shop rating: 5.0 · 1,550+ completed orders · 98% purchase-success rate.
Two Ways to Buy MadisonDia Lab-Grown Diamonds in Japan
Both routes lead to the same diamonds and the same after-care team. The only real difference is how you pay and where your buyer protection sits. Choose whichever feels most comfortable.
Order on madisondia.com
Best if you already shop with international cards or mobile wallets.
- Visa, Mastercard, JCB & American Express
- Apple Pay, Google Pay, UnionPay, Shop Pay
- Full access to custom design & loose-stone selection
Order through our Buyma shop
Best if you want Japan-local payment methods and platform-held buyer protection.
- PayPay & other Japanese QR payments
- Convenience-store payment & pay-later (Paidy)
- Buyma holds your payment until delivery is confirmed
Why Japanese Customers Buy Lab-Grown Diamonds Through Buyma
A diamond is a meaningful purchase, and buying from an overseas brand for the first time can feel like a leap. Buyma removes that hesitation. It is a well-established Japanese marketplace that sits between you and the seller, so your money is protected at every step.
Payment held safely
Buyma holds your payment and releases it to us only after your order is delivered — escrow-style peace of mind.
A proven track record
Our shop carries a 5.0 rating, 1,550+ completed orders and a 98% purchase-success rate, with an average dispatch of three days.
Support in Japanese
Ask about ring size, design or timing before you buy — our team assists you in Japanese throughout.
More Ways to Pay: PayPay, Convenience Store & Japan-Local Options
We are still connecting Japan-local payment rails such as PayPay to our own checkout. Until then, Buyma is the easiest way to pay the way you already do every day. Here is how the two channels compare.
| Payment method | On madisondia.com | On Buyma |
|---|---|---|
| Credit cards (Visa / Mastercard / JCB / Amex) | Yes | Yes |
| PayPay | — | Yes |
| Other QR pay (d Pay, Rakuten Pay, LINE Pay, au PAY, Merpay) | — | Yes |
| Convenience-store payment | — | Yes |
| Pay-later (Paidy) | — | Yes |
| Bank transfer / Pay-easy | — | Yes |
| Apple Pay / Google Pay | Yes | — |
| UnionPay / Shop Pay | Yes | — |
The two channels complement each other: our own checkout carries the mobile wallets, while Buyma carries the Japan-local rails. Choose whichever suits you.
Same Lab-Grown Diamonds, Same MadisonDia Price
Buying through Buyma does not cost you more from us. We list the identical diamond at the identical MadisonDia price on both channels — there is no brand mark-up for choosing the Buyma route. You simply gain more ways to pay and an added layer of platform protection.
The Lab-Grown Diamond Quality Behind Every MadisonDia Piece
Whichever way you order, the standard is the same. Every centre stone of one carat and above is graded and certified by IGI, and the certificate is emailed to you before your piece is dispatched.
D / VVS / 3EX
Centre stones (1ct+) meet a top-colour, VVS-clarity, triple-Excellent-cut standard as a baseline.
IGI certified
An independent IGI report accompanies every 1ct+ diamond — you can confirm it yourself online.
Verified sparkle
Each stone is checked against our MISI™ (MadisonDia Ideal Sparkle Index) — beyond the 4Cs.
Not sure a certificate is genuine? You can check any report number free on IGI’s official tool: Verify Your Report at igi.org. MadisonDia is also a Hong Kong Government “No Fakes” certified dealer.
How to Order MadisonDia Lab-Grown Diamond Jewellery on Buyma
-
1Open our Buyma shop. Browse the MadisonDia lab-grown diamond listings, or send a request if you have a specific design in mind.
-
2Message us first if unsure. Confirm ring size, carat and design in Japanese before you order — there is no obligation.
-
3Pay your way. Choose PayPay, convenience store, pay-later, bank transfer or card at Buyma checkout.
-
4Receive & confirm. We ship from Hong Kong with duty covered; Buyma releases payment once you confirm delivery.
Prefer a completely bespoke ring? You can also design your own engagement ring with us, or read more about MadisonDia.
Lab-Grown Diamond & Buyma FAQ
Is the price the same on your website and on Buyma?
Yes. We list the identical diamond at the identical MadisonDia price on both channels. We never add a mark-up for buying through Buyma — you simply gain more payment options.
Which payment methods can I use on Buyma?
On Buyma you can pay with PayPay and other QR services (d Pay, Rakuten Pay, LINE Pay, au PAY, Merpay), convenience-store payment, pay-later (Paidy), bank transfer and major credit cards. Apple Pay and Google Pay are available on our own website instead.
Why would I buy through Buyma instead of directly?
Choose Buyma if you prefer a Japan-local payment method we do not yet support on our own checkout, such as PayPay, or if you would like the reassurance of Buyma holding your payment until delivery is confirmed.
Are the diamonds the same as on your website?
Yes, they are the very same pieces. Every 1ct+ centre stone is IGI certified to our D-colour, VVS-clarity, triple-Excellent standard, and the certificate is emailed before dispatch.
Do you ship anywhere in Japan, and who pays import duty?
We ship nationwide from Hong Kong — Tokyo, Osaka, Nagoya and every other region. For Japan-bound orders, import customs duty is covered by MadisonDia.
Can I get help in Japanese before I order?
Yes. Our team supports you in Japanese for ring size, design and timing questions, whether you order directly or through Buyma.
How do I check that the diamond certificate is genuine?
Enter your IGI report number on IGI’s official verification page. If the details match the physical certificate we emailed you, the report is authentic. See our full FAQ for more.