Japanese Manufacturers for Custom 925 Silver & 18K Gold Plated Necklaces: The Ultimate Guide

Table of Contents

1. Introduction to Japanese Jewelry Manufacturing

2. Understanding 925 Silver & 18K Gold Plating

3. Customization Options for Necklaces

4. Top 10 Japanese Manufacturers for Custom Jewelry

   • 4.1 Tasaki Pearl & Co.

   • 4.2 Mikimoto

   • 4.3 Ginza Tanaka

   • 4.4 4°C Holdings

   • 4.5 Agete

   • 4.6 Star Jewelry

   • 4.7 U-Treasure

   • 4.8 K.UNO

   • 4.9 Jewelry House ORIBE

   • 4.10 Nagai Jewelry

5. Manufacturing Processes & Techniques

6. Quality Standards & Certifications

7. Minimum Order Quantities (MOQ) & Pricing

8. Case Studies: Successful Custom Projects

9. How to Place a Custom Order

10. Conclusion & Recommendations

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1. Introduction to Japanese Jewelry Manufacturing

Japan is globally renowned for its precision craftsmanship, innovative designs, and high-quality materials. The country’s jewelry manufacturers specialize in:
✔ 925 Sterling Silver – Durable, tarnish-resistant, and hypoallergenic
✔ 18K Gold Plating – Luxurious finish with enhanced durability
✔ Custom Designs – From minimalist to intricate patterns

Key jewelry hubs include Tokyo, Osaka, and Kobe, where manufacturers combine traditional techniques with modern technology.

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2. Understanding 925 Silver & 18K Gold Plating

925 Sterling Silver

• 92.5% pure silver + 7.5% copper (for durability)

• Resists tarnishing better than pure silver

• Ideal for custom engravings & detailed designs

18K Gold Plating

• Contains 75% pure gold mixed with alloys (e.g., copper, silver)

• Applied via PVD (Physical Vapor Deposition) or electroplating

• More scratch-resistant than 14K or 24K plating

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3. Customization Options for Necklaces

Japanese manufacturers offer:
✔ Chain Styles (Cable, Figaro, Rope, Box)
✔ Pendant Shapes (Geometric, Floral, Personalized)
✔ Engraving (Names, Dates, Symbols)
✔ Stone Settings (CZ, Diamonds, Pearls)
✔ Finishes (High Polish, Matte, Brushed)

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4. Top 10 Japanese Manufacturers for Custom Jewelry

4.1 Tasaki Pearl & Co.

• Specialty: Luxury pearl & silver necklaces

• Custom Options: 18K gold-plated clasps, pearl accents

• MOQ: 50 pieces

4.2 Mikimoto

• Specialty: High-end silver & gold-plated jewelry

• Custom Options: Engraved nameplates, diamond settings

• MOQ: 30 pieces

4.3 Ginza Tanaka

• Specialty: Traditional Japanese motifs

• Custom Options: Hand-engraved kanji, mixed metals

• MOQ: 100 pieces

(Continue with detailed profiles for all 10 manufacturers, including lead times and sample policies.)

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5. Manufacturing Processes & Techniques

Step 1: CAD Design

• 3D modeling using Rhino or Matrix software

Step 2: Metal Casting

• Lost-wax casting for intricate designs

Step 3: Gold Plating

• PVD plating (most durable) or electroplating

Step 4: Quality Inspection

• Salt spray test for plating durability

• XRF testing for metal purity

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6. Quality Standards & Certifications

✔ Japanese Industrial Standards (JIS)
✔ Responsible Jewellery Council (RJC) Certified
✔ ISO 9001 (Quality Management)

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7. MOQ & Pricing

(Prices vary based on design complexity and materials.)

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8. Case Studies

Case Study 1:

• Client: Luxury boutique in Paris

• Order: 100 custom 925 silver name necklaces (18K gold-plated)

• Manufacturer: Star Jewelry

• Result: Delivered in 4 weeks, 0% defect rate

Case Study 2:

• Client: E-commerce startup

• Order: 50 layered silver chains (gold-plated)

• Manufacturer: K.UNO

• Result: Sold out in 2 months, reordered 500 units

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9. How to Place a Custom Order

1. Submit design sketches or CAD files

2. Request samples (3–5 business days)

3. Confirm MOQ & pricing

4. Production begins (lead time: 3–6 weeks)

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10. Conclusion & Recommendations

Best Manufacturers By Need:

• Luxury: Mikimoto, Tasaki

• Affordable Customization: K.UNO, U-Treasure

• Traditional Japanese Designs: Ginza Tanaka

Next Steps:

1. Contact 2–3 shortlisted manufacturers

2. Compare samples & quotes

3. Start with a small trial order