Common Questions

Every kataoka creation is accompanied by a Lifetime Limited Warranty, reflecting our commitment to quality and lasting craftsmanship.

Each piece is handcrafted to order in our Tokyo atelier, requiring approximately three to four weeks. For time-sensitive requests, please contact us and we will do our best to accommodate your timeline.

Our standard specification is D color, VS-1 clarity, excellent cut minimum for diamonds 0.25 ct. and above. If you would like higher specifications, please contact us.

Every metal blend is custom-formulated in-house for purity, durability, and a distinctive sheen. Our gold and platinum are ethically recycled from Japan's semiconductor industry.

No. We work exclusively with custom-blended 18k gold and platinum 900, chosen for their quality and hypoallergenic properties.

Our gemstones are hand-selected from trusted partners committed to ethical sourcing. Each stone is chosen for its quality, beauty, and compatibility with our designs.

Every piece is handcrafted by Yoshinobu Kataoka in our Tokyo atelier.

We offer complimentary engraving on most rings. Please contact us with your request.

Yes. Yoshinobu Kataoka personally assesses and restores every piece at our Tokyo atelier. Please contact us for guidance on the process.

Please contact us immediately. Yoshinobu Kataoka will personally assess and restore your piece to its original condition.

No. We work exclusively with natural, ethically sourced diamonds.

Every piece is handcrafted by Yoshinobu Kataoka from hand-selected natural diamonds, ethically recycled metals custom-blended in-house, and gemstones chosen for their individual character. Each creation is supported by our Lifetime Limited Warranty.

Our rings are designed as complete compositions where the center diamond is integral to the design. Offering them complete preserves the integrity of the piece and the Lifetime Limited Warranty.

We work exclusively with our own ethically sourced gemstones, chosen for their compatibility with our designs.

We offer complimentary worldwide shipping via FedEx International Priority. Packages typically arrive within 2 business days and require an adult signature upon delivery. For full details, see our delivery page.

Each kataoka creation is handcrafted to order. All sales are final. We encourage you to contact us with any questions before placing your order.

For orders placed directly with kataoka, we offer one complimentary resizing within the first year of purchase. After the first year, each resizing is $300.

For our US clients, send your ring to our New York flagship. We will coordinate shipping to our Tokyo atelier for resizing and return it to you in New York. You cover the domestic shipping fee only.

For international clients, send the ring directly to our Tokyo atelier. You are responsible for shipping fees to and from Japan.

For rings purchased through an authorized retailer, each resizing is $300. Please contact us for assistance.

We recommend visiting a kataoka flagship or a trusted local jeweler for a measurement in US sizing. The afternoon or early evening is ideal, as finger size is most stable then. Note that fingers are slightly larger in warm weather and smaller in cold.

Your ring can be resized as many times as needed. For designs with delicate stone settings, certain limitations may apply. Contact us for guidance specific to your piece.

We accept Visa, Mastercard, Discover, JCB, American Express, and PayPal. All transactions are processed securely. No credit card information is stored.

We do not currently offer financing. If you have questions about your purchase, please contact us.

All orders ship directly from our atelier in Tokyo, Japan.

Yes. Once your order ships, we send a tracking number by email. You can also check your order status under "My Account" on our website.

For US clients, customs duties and paperwork are fully managed by us with no additional fees. International clients may incur customs duties based on local regulations. We recommend consulting your country's customs agency for details.

Please contact us within 24 hours of placing your order. Once production begins, modifications and cancellations are not possible.

We do not provide appraisals. We can issue a detailed receipt for insurance purposes. For formal appraisals, we recommend a certified third-party expert.

No. Each piece is handcrafted in limited quantities, and our pricing reflects the materials, labor, and artistry involved. For updates on new creations and limited releases, subscribe to our newsletter.

You can review them here. For questions, please contact us.

For wholesale and partnership inquiries, please contact us directly.

For press inquiries, please contact us.

We welcome applications from talented individuals. Please visit our career opportunities page or send your resume directly.

We are here to help. Please contact us.