Suwa

What Suwa does

Suwa and Son Inc., operating as SUWA, is a Tokyo-headquartered, privately held Japanese jeweler specializing in gemstone-oriented fine jewelry — diamond, ruby, sapphire, and emerald pieces — for affluent consumers, bridal buyers, and gift purchasers. The company sells finished jewelry through department stores and specialty jewelers in Japan, through 29 authorized fine jewelry dealers across 15 US metropolitan areas (supported by a California regional office), and via a recently launched official online shop with a free ring-size gauge lending service. The product portfolio spans Anniversary Band Rings, Classic Diamond Rings, Marquise-cut Diamond Jewelry, Ephesus octagon collections, uncut/rough diamond pieces, and a dedicated bridal line (Diamond Eternity Rings, Wedding Bands, Color Stone Band Rings, Air Setting bridal rings).

SUWA's technical differentiation rests on two proprietary capabilities: the original Air Setting technique, which positions diamonds upward in a step-like arrangement to maximize light return, and a hand-driven Gem Quality (GQ) standard combined with expert gemstone matching — particularly for baguette and small-stone layouts. The firm sources directly from Myanmar Mong Hsu (ruby) and Cambodia/Sri Lanka/Nigeria/Madagascar (sapphire), with buyers personally verifying stone quality. Capital is stated at 100,000,000 yen and headcount is 11–50.

Revenue is generated across three streams: (1) branded finished jewelry sales through Japan retail, the US dealer network, and the official online shop; (2) wholesale of loose diamonds and colored stones to manufacturers and retailers; and (3) OEM manufacturing of gemstone-oriented jewelry for major brands in Japan and the United States. Leadership comprises Chairman Yasukazu Suwa and President/CEO Michio Yokokawa, with MUFG Bank (Kyobashi branch) as the main banking relationship and no disclosed parent or institutional investors.

Name

Suwa

Legal name

Suwa and Son Inc.

Website

https://suwagem.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

Suwa and Son Inc. (SUWA) is a Tokyo-headquartered Japanese jeweler specializing in gemstone-oriented fine jewelry (diamond, ruby, sapphire, emerald) for affluent, bridal, and gift consumers, sold via Japan retailers, 29 US dealers across 15 metros, an online shop, plus OEM and loose-stone wholesale.

Ownership category

akta.pro rank

Product category

Fine Jewelry

NAICS

Jewelry and Silverware Manufacturing (33991), Jewelry Retailers (45831), Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers (423940)

SIC

Jewelry, Precious Metal (3911), Retail-Jewelry Stores (5944), Wholesale-Jewelry, Watches, Precious Stones & Metals (5094)

akta.pro primary industry

Fine Jewelry Manufacturing (Precious Metals & Gem-Set) (CRAKAIAA)

akta.pro secondary industries

Diamond Jewelry (CRAKAAAA), Colored Gemstone Jewelry (CRAKAAAB), Precious Metal Jewelry (Gold/Platinum/Silver) (CRAKAAAD), Fine Jewelry Wholesale & Trading (CRAKAAAL)

Keywords

• Gemstone fine jewelry
• Diamond bridal rings
• Colored stone jewelry
• Loose diamond wholesale
• Jewelry OEM manufacturing

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. SUWA Gemstone-Oriented Jewelry Sales: SUWA's gemstone-oriented jewelry is sold through department stores and jewelry specialty stores in Japan, and overseas through fine jewelry stores primarily in the United States (29 stores in 15 metropolitan areas). Also sold through official online shop and bridal collections.
2. Loose (Unmounted) Stone Sales: Loose diamonds and colored stones are procured from cutting centers worldwide and wholesaled to manufacturers and retailers. Quality is personally confirmed by buyers who use knowledge acquired through years of experience.
3. OEM Manufacture of Gemstone-Oriented Jewelry: SUWA serves as an OEM supplier of jewelry for major brands in Japan and the United States, recognized for ability to procure component materials and exceptional manufacturing techniques.

Go-to-market motion1 record

Distribution channels5 records

Marketing channels4 records

Core offering

Suwa (Suwa and Son Inc.) designs, manufactures, and sells gemstone-oriented fine jewelry — including anniversary band rings, classic diamond rings, marquise-cut pieces, uncut diamond jewelry, Ephesus octagon jewelry, pendants and earrings, and a bridal collection of eternity rings, wedding bands, and color stone bands — alongside loose diamonds and colored gemstones (rubies from Myanmar, sapphires from Cambodia/Sri Lanka/Nigeria/Madagascar, emeralds). The company also wholesales loose stones and provides OEM manufacturing services for major jewelry brands in Japan and the U.S.

Product overview

SUWA is a Japanese gemstone-oriented jewelry company offering a diverse portfolio of fine jewelry products. The core product line includes Anniversary Band Rings featuring colored stones (rubies, sapphires) and diamonds in various cuts (baguette, square, oval, marquise), Classic Diamond Rings with continuous diamond brilliance, Marquise-cut Diamond Jewelry with elegant leaf-like shapes, Anniversary Jewelry (pendants and earrings), Ephesus octagon-shaped pieces symbolizing good fortune, and unique Uncut Diamond Jewelry showcasing natural rough diamonds. The bridal collection encompasses Diamond Eternity Rings, Diamond Band Rings, Wedding Bands, and Color Stone Band Rings. SUWA also offers loose diamonds (rough, single cut, marquise cut, baguette cut) and colored stones (rubies from Myanmar, sapphires from multiple origins, and emeralds). The company operates an official online shop for direct sales. Their signature Air Setting technique maximizes diamond brilliance by positioning stones to face upward. Products are sold through department stores, jewelry specialty stores in Japan, and 29 fine jewelry stores across 15 metropolitan areas in the United States.

Differentiator

Problem solved

Functional benefit

Products and services

• Anniversary Band Rings Ring collection featuring combinations of colored stones (rubies, sapphires) with diamonds, including baguette-cut, square-cut, and oval-cut variations set in 18K yellow gold or platinum. Designed for anniversary and bridal occasions.
• Classic Diamond Rings Rings featuring continuous lines of diamond brilliance using various cuts including round brilliant-cut and marquise-cut diamonds in prong settings.
• Marquise-cut Diamond Jewelry Jewelry pieces featuring marquise-cut diamonds in elegant leaf-like shapes, often combined with round brilliant-cut diamonds for contrast.
• Anniversary Jewelry Pendant and earring collections designed to match Anniversary Band Rings, featuring combinations of rubies, sapphires, and diamonds in various cuts.
• Ephesus Octagon-shaped jewelry symbolizing good fortune and eternity, available in both classic and bridal collections.
• Uncut Diamond Jewelry Unique jewelry pieces featuring naturally-formed rough diamonds that retain their original crystalline beauty from nature.
• Diamond Eternity Rings Bridal rings featuring diamonds set around the entire band for continuous brilliance.
• Diamond Band Rings Bridal band rings with diamond accents for wedding celebrations.
• Wedding Bands Simple metal wedding bands for marriage ceremonies.
• Color Stone Band Rings Bridal bands featuring colored gemstones such as rubies or sapphires.
• Pendants & Earrings Gift-oriented pendants and earrings featuring diamonds, rubies, sapphires, and other gemstones.
• SUWA Rubies Gem-quality rubies sourced from Myanmar's Mong Hsu mines, featuring nearly pure red color with high transparency, sold as loose colored stones to manufacturers and retailers.
• SUWA Sapphires Gem-quality blue sapphires from Cambodia, Nigeria, Sri Lanka, and Madagascar with noble blue coloration, sold as loose colored stones.
• SUWA Emeralds Emerald offerings with quality matching and combining guidance, sold as loose colored stones.
• Rough Diamonds Unpolished diamond material sold separately for collectors and manufacturers.
• Single Cut Diamonds Single-cut diamonds typically used as accents in jewelry pieces.
• Marquise Cut Diamonds Marquise-cut diamonds in SUWA's standard sizes for jewelry setting.
• Baguette Cut Diamonds Baguette-cut diamonds featuring step-cut facets for Art Deco-inspired elegance.
• SUWA Official Online Shop Official SUWA online store enabling direct purchase of jewelry items, including a free size gauge lending service for rings and in-store viewing options at authorized dealers.
• Loose Stone Wholesale Wholesale of loose diamonds and colored stones procured from cutting centers worldwide to manufacturers and retailers, with quality personally confirmed by Suwa buyers.
• OEM Manufacturing of Gemstone-Oriented Jewelry OEM supply of gemstone-oriented jewelry for major brands in Japan and the United States, leveraging Suwa's component material procurement and manufacturing techniques.

Quantifiable outcome

• 29 fine jewelry stores across 15 US metropolitan areas
• +1 more outcomes

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Department Stores and Jewelry Specialty Stores (Japan)coreChannel Partner/ Reseller/ DistributorAuthorized retail partners selling SUWA jewelry in Japan through department stores and specialty jewelry retailers.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Tasaki: Japanese fine jewelry brand combining pearls with diamond and colored gemstone pieces. Comparable in domestic Japanese luxury positioning and bridal assortment.
• Pomellato: Italian fine jewelry maker with strong colored stone identity and chain-set designs. Comparable as a design-led, colored-stone-emphasizing manufacturer selling through select global retailers.
• Damiani: Italian fine jewelry manufacturer and brand with vertical production and own boutiques. Overlaps with SUWA on gemstone-set precious metal manufacturing and luxury branding.
• Harry Winston: High-end fine jewelry house specializing in diamonds and precious colored stones, with comparable bridal and heirloom positioning. Most analogous to SUWA in product mix, gemstone-led storytelling, and premium pricing.
• Van Cleef & Arpels: Iconic fine jewelry maison known for colored stone expertise and signature setting techniques (e.g., Mystery Setting). Overlaps with SUWA on gem-set precious metal jewelry and craftsmanship-driven differentiation.
• Mikimoto: Japanese heritage fine jewelry house with bridal collections and high gemstone standards. Shares Japanese origin, luxury heritage, and bridal and colored stone product lines with SUWA.
• Kwiat: US-based heritage diamond jeweler specializing in bridal and signature diamond cuts. Comparable on diamond expertise, bridal focus, and family-run heritage positioning.

Broad incumbents

• Tiffany & Co. Global luxury jewelry incumbent with broad diamond and colored stone assortment, extensive own retail, and bridal leadership. Sets the benchmark for US and global jewelry distribution that SUWA's 29-store US network aspires toward.

Others

• Kunming Diamond (or comparable gemstone wholesale houses): Asian-based loose diamond and colored stone wholesalers serving manufacturers and retailers globally. Comparable to SUWA's wholesale loose-stone revenue stream on the supply side of the jewelry value chain.

Market position

Strengths5 records

Weaknesses6 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/suwa-and-son-inc-

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Suwa