株式会社グッド

What 株式会社グッド does

株式会社グッド (Good Co., Ltd.) is a privately held Japanese health-products company founded in March 2005 and headquartered in Kyoto, with a Tokyo sales office opened in December 2018 and a stated headcount of 21 employees. The company develops, distributes, and markets a portfolio of wearable health and wellness products built around three proprietary technology platforms: (i) Savior Stone (セイバー鉱石®), a blended rare-mineral powder combining 貴陽石 from Gunma Prefecture and 皇輝石 from Okayama Prefecture, processed to 60μ and engineered to emit mid-infrared rays in the 4–14 μm wavelength range; (ii) HEARTZ / Shuhasu Kako® (周波数加工®), a proprietary frequency-processing technology intended to align the body's natural frequencies (~2,030) and support brain-to-body signal transmission, applicable to jewelry, body patches, apparel, and other substrates; and (iii) MISC (Micro Savior Coating), a 150–200°C thin-film coating process that bonds Savior Stone particles to metal surfaces including gold. The flagship wearable lines (Savior Stone series) carry Japanese general medical device certification (医療機器認証番号 13B2X10089000011), and the Rakunal® lumbar support belt holds Japanese Patent No. 5319680 with parallel patents in 7 countries.

The company's commercial model is a hybrid B2B wholesale and B2C direct operation. Its primary go-to-market is a direct field-sales team (営業) that visits specialist retail boutiques, jewelry stores, costume-jewelry stores, kimono shops, and regional wholesale distributors across Japan. Revenue streams include wholesale distribution of health-related products and household medical devices, event-driven sales and consulting services for new health-business planning, and direct-to-consumer sales via the official online shop (goodshop.shop-pro.jp). Pricing is unit-based across a broad SKU range, from low-ticket consumables such as HEARTZ Super Seal body patches (¥1,430 for an 8-pack retail) to premium 18K gold jewelry. The strategic supply and technology relationship is anchored by 株式会社ハーツ＆ハーツクリニック (Hearts & Hearts Clinic), whose representative director has served as company advisor since March 2010. Distribution is domestic-only, with no disclosed international expansion.

Name

株式会社グッド

Legal name

株式会社.good

Website

https://kkgood.com

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

11–50 employees

Short description

株式会社グッド is a privately held Kyoto-based Japanese health-products company that wholesales and retails proprietary wearable wellness products — including Savior Stone mineral jewelry, HEARTZ frequency-processing accessories, and Rakunal support belts — primarily to specialist retail boutiques and consumers across Japan.

Ownership category

akta.pro rank

Product category

Health & Wellness Wearable Products

NAICS

Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers (42394), Cut Stone and Stone Product Manufacturing (327991)

SIC

Jewelry, Silverware & Plated Ware (3910), Orthopedic, Prosthetic & Surgical Appliances & Supplies (3842)

akta.pro primary industry

Stone Setting & Gem Mounting Services (CRAKAIAG)

akta.pro secondary industry

Children’s & Men’s Jewelry Manufacturing (CRAKAIAN)

Keywords

• Health jewelry accessories
• Frequency processing wellness
• Medical device accessories
• Custom orthotic insoles
• Health products wholesale

Headquarters

HQ city

Kyoto

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. 卸販売 — 健康関連商品・家庭医療用具・環境関連商品: Wholesale distribution of health-related products, household medical devices, and environmental products to specialist retail stores, regional wholesalers, and national sales agents. Revenue is generated through bulk product sales to B2B channel partners.
2. 企画・提案 — 催事販売・健康新規事業企画・経営コンサルタント: Event planning and sales execution for health-related promotions nationwide, as well as consulting services for new health business planning. Revenue from service fees and event-based sales commissions.
3. E-commerce sales (direct-to-consumer): Direct consumer sales via the company's official online shop (goodshop.shop-pro.jp), selling individual products at retail prices to end consumers.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels5 records

Core offering

株式会社グッド designs, distributes, and sells health-oriented jewelry, apparel, body patches, waist support belts, and custom orthotic insoles built around three proprietary technology platforms: SAVIOR STONE® (blended rare natural mineral stone emitting mid-infrared rays), HEARTZ® frequency-processing (Hz alignment), and LA SALUTE® custom insoles. Products are sold both wholesale to specialty retail stores (jewelry boutiques, kimono shops, regional wholesalers) via field sales and direct-to-consumer through the company's official online shop. The SAVIOR STONE series carries general medical device certification (No. 13B2X10089000011).

Product overview

株式会社good offers a portfolio of health and wellness products centered on three core technology platforms: SAVIOR STONE® (rare-earth stone blend emitting mid-infrared rays), HEARTZ® frequency-processing technology (proprietary body-frequency alignment), and LA SALUTE® custom insoles (orthopedic foot support). Product lines span jewelry accessories (necklaces, bracelets, rings), body patches (HEARTZ Super Seal), compression apparel and daily goods, waist-support belts (Rakunal®), and custom insoles. A sports/casual sub-brand G-DASH® makes frequency-processing products accessible for athletic use. The company operates as a wholesale distributor with its own e-commerce shop, primarily selling to specialty retailers and consumers across Japan.

Differentiator

Problem solved

Functional benefit

Brands

• Good-Heartz (.goodハーツ): Health jewelry brand featuring frequency-processing technology (周波数加工®) applied to accessories.
• G-DASH (ジーダッシュ)
• ラサルテ (LA SALUTE)
• ラクナール (Rakunal)
• good楽ナール
• (super) SEAL 8

Products and services

• SAVIOR STONE® Series (セイバー鉱石®シリーズ) Health-oriented jewelry (necklaces, bracelets, rings) made with a proprietary blended rare mineral stone combining Gunma Kiyouseki and Okayama Kikiseki, processed to 60μ powder and emitting medium infrared rays (4–14 μm). All products in the series carry general medical device certification. Targeted at consumers seeking fashionable wellness accessories for daily health support.
• HEARTZ® Frequency-Processed Products (ハーツ加工® / 周波数加工®) Products incorporating the proprietary HEARTZ frequency-processing (周波数加工®) technology that aligns the body's approximately 2,030 naturally occurring frequencies to support smooth brain-to-body information transmission. Applied to accessories, body seals, and apparel. Targeted at consumers seeking non-invasive wellness wearables with claims of permanent effectiveness.
• G-DASH® HEARTZ Sports/Casual Line (ハーツ加工® G-DASH®) Casual and sports-oriented HEARTZ frequency-processing line — silicone-based bracelets and necklaces with magnetic clasps and stainless steel cores. Co-developed with Hearts & Hearts Clinic. Endorsed and used by professional athletes including marathon runner 赤﨑暁.
• HEARTZ Super Seal Body Patches (HEARTZ スーパーシール) Body seal patches applied directly to the skin, made of polyurethane nonwoven fabric and containing HEARTZ frequency-processing technology. Available in Regular 8-sheet boxes (¥1,430) and bulk 100-sheet packs (¥14,300). Designed for daily body balance support.
• HEARTZ Apparel & Daily Goods (HEARTZ 衣類・日用品)

Quantifiable outcome

• Lumbar stress reduced to 1/9 of baseline (ラクナール belt)
• +3 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Four partnerships are on record, tiered core and minor.

• 株式会社ハーツ＆ハーツクリニックcoreStrategic or Co-development PartnerKey strategic partner and main supplier of health products. The company sources its core product lines (HEARTZ frequency processing products) from this partner. Joint development partner for the G-DASH brand (registered trademark No. 6429123). Their advisor 川邉政実 (also representative of the partner company) has served as company advisor since 2010.
• 安治川部屋 (Ajikawa Sumo Stable) — 安美錦氏minorGTM or Marketing PartnerFormer rikishi 安美錦 (who took the name 安治川 upon retirement as stablemaster) serves as a 'Good Hearts Ambassador' endorsing the company's products. The company provides original Good Hearts wallpapers for the Ajikawa stable facility (opened June 2022) and created commemorative rope banners for the official retirement ceremony in May 2022.
• 九電工 (Kyushu Electric Power) / 赤﨑暁minorGTM or Marketing Partner赤﨑暁, a professional long-distance runner employed by Kyushu Electric Power (九電工), has been a long-term user of HEARTZ products. He competes in major marathons (Tokyo Marathon 2025, Fukuoka International Marathon 2022) while using company products, serving as a high-profile athlete endorser. He was invited to Tokyo Marathon 2025 as an elite runner.
• 奥球磨駅伝競走大会実行委員会minorGTM or Marketing PartnerThe company serves as Gold Sponsor of the 奥球磨駅伝競走大会 (Okukuma Ekiden Race) in Kumamoto Prefecture for three consecutive years (2022, 2023, 2024). This is the largest ekiden event in the Kyushu region, connecting four municipalities over 42.195km with university, corporate, and high school teams.

Scale indicators2 records

Recent moves11 records

Expansion highlights5 records

Direct peers

• Superfeet Worldwide: U.S.-based premium custom and off-the-shelf insoles brand distributed globally, including in Japan via specialty retail. Directly comparable to LA SALUTE in product category (premium insoles for posture/gait correction) and custom-fitting business model.
• Aimedic MMT (Matsumoto Medical): Japanese orthopedic appliance manufacturer producing lumbar-support belts, posture correctors, and related medical devices. Directly comparable to the company's Rakunal belt line in product category and clinical/regulatory positioning.
• Colantotte Inc. Japanese magnetic health-jewelry brand (necklaces, bracelets, rings) marketed on circulation, fatigue recovery, and posture benefits. Closely comparable in product form-factor, wellness positioning, and Japanese retail-boutique distribution.
• Medi Japan: Subsidiary of German medi GmbH, marketing compression hosiery, orthopedic supports, and foot-care products in Japan. Comparable to Good Co.'s HEARTZ compression socks/tights and Rakunal belt lines in orthopedic retail channels.
• Phiten Inc. Japan's largest health-and-wellness jewelry company, selling titanium- and aqua-treated necklaces, bracelets, and tapes through specialty retail and DTC. Directly comparable to Good Co. in target customer (Japanese wellness consumers), product format (wearable health jewelry), and distribution model (specialty retail + sports partnerships).

Broad incumbents

• Dr. Scholl's (Bayer Consumer Health, Japan): Global foot-care brand offering custom and OTC insoles, foot-care products, and posture-related items in Japan. Comparable as a direct competitor to the company's LA SALUTE custom-insoles product line, though operating at much larger scale.
• Asahi Kasei (Consumer & Healthcare segment): Large Japanese diversified materials/healthcare conglomerate producing Ziploc, Beml, and Saran wrap consumer lines plus medical-device materials. Comparable as a broad incumbent with adjacent health, wellness, and material-science IP relevant to health wearables, though far larger and broader in scope.
• Nikken Inc. Global Japanese-origin wellness company selling magnetic jewelry, sleep systems, and water-technologies through MLM/direct-sales. Comparable as a large incumbent in the broader health-and-wellness wearables category with overlapping Japanese and global reach.

Emerging players

• SIGVARIS Japan: Swiss compression-therapy brand with Japanese distribution, marketing medical-grade compression socks and hosiery. Comparable to Good Co.'s HEARTZ compression products (脚美人 series) in product category and Japanese retail channels.

Others

• Hisamitsu Pharmaceutical: Major Japanese OTC pharmaceutical company (Salonpas, etc.) with deep retail relationships across Japanese drugstores and specialty channels. Adjacent peer in the broader Japanese consumer health-and-wellness category, with potential distribution-partner relevance to Good Co.'s health-jewelry portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Instagraminstagram.com/kkgood_com
• LinkedInlinkedin.com/company/%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE%E3%82%B0%E3%83%83%E3%83%89

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 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 株式会社グッド