What RYOWA does

RYOWA Setsubi Co., Ltd. (菱和設備株式会社) is a Japanese building equipment systems contractor specializing in the design, installation, and maintenance of HVAC (air conditioning, ventilation, air cleaning), water supply and sanitation, fire safety/protection, and refrigeration/cold storage systems. Founded in 1953 in Shizuoka and formally incorporated in 1957, the company operates through seven branch offices across Shizuoka Prefecture, the Tokyo metropolitan area, and Kanagawa Prefecture, employing 330 people. The company holds Special and General construction permits from the Ministry of Land, Infrastructure, Transport and Tourism, and is a registered ZEB (Net Zero Energy Building) Planner.

The company serves a diversified customer base spanning government and public agencies (Tokyo Metropolitan Government, Shizuoka City Waterworks Bureau, Mt. Fuji Shizuoka Airport), healthcare facilities (Saitama City Hospital, Shizuoka Prefectural General Hospital), commercial real estate (Tokyo Big Site, K Tower Yokohama, KT Building), hospitality (Fujiya Hotel, Hotel Indigo Hakone Gora), education, and retail sectors. Revenue is generated through project-based, one-time contracts for new construction and renovation, plus ongoing maintenance services, with projects sourced via direct enterprise field sales, referrals, and public tenders. RYOWA also operates as the exclusive general sales agent for Mitsubishi Heavy Industries thermal products, integrating proprietary equipment into its system designs. The company is privately held by the founding Yamana family, with leadership transitioning to the third generation in 2023, and is certified under ISO 9001 (since 1999) and ISO 14001 (since 2004).

Name

RYOWA

Legal name

菱和設備株式会社 (RYOWA Setsubi Co., Ltd.)

Website

https://ryowa-s.co.jp

Company type

Private

Founded year

1957

Operating status

Operating

Headcount range

251–500 employees

Short description

RYOWA Setsubi Co., Ltd. is a Japanese building equipment systems contractor specializing in HVAC, water/sanitation, fire safety, and refrigeration design, installation, and maintenance for government, commercial, healthcare, hospitality, and institutional buildings across Shizuoka and Greater Tokyo.

Ownership category

akta.pro rank

Product category

Building Equipment Contracting (HVAC, Plumbing, Fire Protection, Refrigeration)

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Refrigeration & Service Industry Machinery (3580)

akta.pro primary industry

HVAC & Refrigeration Contracting (IMAFALAB)

akta.pro secondary industries

Building Automation & Controls (BAS/BMS) Contracting (IMAFALAE), Warehousing, Distribution & Cold Storage Facility Construction (IMAFADAL), HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration) (EUAEAFAE), Chillers, Boilers & Central Plant Operations (BPABACAG)

Keywords

• HVAC systems
• Building equipment construction
• Water supply sanitation
• Fire safety systems
• Refrigeration cold storage

Headquarters

HQ city

Shizuoka-shi

HQ country

Japan

HQ region

Asia

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. HVAC Equipment Design and Construction: Design and construction services for air conditioning and ventilation systems in offices, commercial facilities, schools, hospitals, hotels, art museums, and libraries. Projects are fee-for-service, one-time engagements for new construction and renovation. Revenue recognized upon project completion.
2. Water Supply and Sanitation Design and Construction: Design and construction of water supply and drainage systems for buildings, ensuring hygienic living environments. Revenue generated through project-based contracts for new construction and retrofitting.
3. Fire Safety System Design and Construction: Design and installation of fire protection equipment including sprinkler systems, hose reel systems, fire extinguishers, and gas-based suppression systems, in compliance with the Fire Service Act. Revenue from project-based construction contracts.
4. Refrigeration and Cold Storage Design and Construction: Design and construction of cold storage and refrigeration facilities for food-related industries, particularly tea and citrus products, maintaining optimal temperature and humidity for product preservation. Project-based revenue model.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

RYOWA is a building equipment contractor that designs, constructs, and maintains HVAC (air conditioning, ventilation, air cleaning), water supply and sanitation, fire safety/protection, and refrigeration/cold storage systems for offices, hospitals, hotels, government facilities, schools, and commercial buildings. Services span the full equipment lifecycle from initial design through construction to ongoing maintenance and renovation. The company also provides registered ZEB Planner consulting for energy-efficient and Net Zero Energy Building projects, and operates as the exclusive general sales agent for Mitsubishi Heavy Industries thermal products.

Product overview

RYOWA is a building equipment contractor (subcontractor) offering four integrated core services: HVAC systems, water supply and sanitation systems, fire safety systems, and refrigeration/cold storage systems. The company provides design, construction, and maintenance services primarily for commercial, institutional, and industrial buildings including offices, hospitals, hotels, schools, and manufacturing facilities. Their services are delivered through a project-based model combining design, construction, and after-sales maintenance, with specialized ZEB planning services for energy-efficient building projects.

Differentiator

Problem solved

Functional benefit

Products and services

• HVAC Systems (空調設備) Design and construction of air conditioning, ventilation, and air cleaning systems that control temperature, humidity, airflow, cleanliness, odor, bacteria, dust, and oxygen levels to create healthy and comfortable indoor environments for offices, commercial spaces, schools, hospitals, hotels, and museums.
• Water Supply and Sanitation Systems (給排水衛生設備) Design and installation of plumbing systems for water/hot water supply and sanitary drainage in buildings, ensuring safe water supply and hygienic environments through engineering for pressure, temperature, volume, and quality.
• Fire Safety Systems (消防防災設備) Design and installation of fire protection equipment including water-based systems (indoor/outdoor hydrants, sprinklers, hose reels) and gas-based systems (inert gas, halogen, powder extinguishers), in compliance with the Fire Service Act, protecting buildings, occupants, and property.
• Refrigeration and Cold Storage Systems (冷凍冷蔵設備) Design and construction of cold storage and refrigeration facilities for food-related industries, with precise temperature and humidity control for product preservation. Particularly applied to local Shizuoka products such as tea and citrus.
• ZEB Planning Services Consulting and planning services for Zero Energy Buildings, including energy-saving architectural design, natural energy utilization, high insulation, and high-efficiency equipment. Registered as a ZEB Planner (Phase 2, registration number ZEB2022P-00058) on July 29, 2022.
• Maintenance and Renovation Services Ongoing maintenance, inspection, and renovation planning services for installed equipment and systems across HVAC, plumbing, fire protection, and refrigeration to ensure long-term functionality.

Quantifiable outcome

• Approximately 1 million sheets of paper reduced through internal digitalization since 2017, equivalent to preserving ~100 trees and reducing CO2 by ~1,360 kg
• +1 more outcomes

Named customers18 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered supporting, core and minor.

• Ryowa Equipment Founding Memorial Scholarship Fund (公益信託 菱和設備創立記念奨学基金)supportingOthers · 1 April 2015Charitable trust scholarship fund established by RYOWA in April 2015 to support excellent students in Shizuoka Prefecture. The fund provides non-repayable scholarships to motivated high school students, supporting the next generation and contributing to regional talent development.
• Mitsubishi Heavy Industries Thermal Systems (三菱重工冷熱製品)coreChannel Partner/ Reseller/ DistributorRYOWA serves as the exclusive general sales agent (総代理店) for Mitsubishi Heavy Industries thermal product sales in its service region, integrating Mitsubishi's HVAC and refrigeration equipment into its building system designs.
• LRQA Limited (LRQAリミテッド)supportingOthersThird-party certification body that conducts annual surveillance audits for RYOWA's ISO 9001 and ISO 14001 management system certifications across all branch offices.
• Mitsubishi UFJ Bank (三菱UFJ銀行)supportingOthersPrimary banking partner among RYOWA's main transaction banks.
• Shizuoka Bank (静岡銀行)supportingOthersOne of RYOWA's main transaction banks, providing banking services and financial support.
• SII - Sustainable Open Innovation Initiative (一般社团法人環境共創イニシアチブ)coreOthersSII is the registration body for ZEB Planner certification. RYOWA registered as a ZEB Planner (Phase 2) on July 29, 2022, enabling the company to provide ZEB and energy-efficient building consulting services to clients.
• Resort Facility Network (エクシブ, サンクチュアリコート, ラグーナベイコート)minorOthersCorporate membership in multiple luxury resort facilities including Exiv Tobal, Sanctuary Court Takayama, and Laguna Bay Court. Available to all employees as part of the benefits package, supporting work-life balance and employee wellbeing.
• MyNavi Corporation (らうんnavi株式会社)coreChannel Partner/ Reseller/ DistributorMyNavi operates the primary online recruitment platform used by RYOWA for both new graduate and mid-career hiring. Job listings, company profiles, and application processing are handled through the MyNavi platform (job.mynavi.jp).

Scale indicators5 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• Kyudenko Co., Ltd. Major electrical and air-conditioning contractor headquartered in Fukuoka with nationwide operations. Comparable to RYOWA as a multi-branch MEP contractor, particularly in HVAC and building equipment design/installation for commercial and public-sector facilities.
• Kandenko Co., Ltd. Large diversified electrical and mechanical infrastructure contractor serving utilities, commercial, and public-sector clients across Japan. Comparable to RYOWA in MEP capabilities but operates at significantly larger national scale with broader electrical and infrastructure exposure.
• Nippon Densetsu Kogyo Co., Ltd. Japanese electrical and mechanical engineering contractor focused on rail, buildings, and infrastructure. Overlaps with RYOWA in MEP services for institutional and government buildings, though more weighted to electrical and rail signaling.
• Takuma Co., Ltd. Japanese plant engineering and environmental systems contractor with capabilities in energy, waste, and HVAC for industrial and public-sector facilities. Comparable to RYOWA in MEP scope but more weighted to large-scale plant and environmental engineering projects.

Regional players

• Sankyo Tateyama, Inc. Building materials and interior systems manufacturer with regional operations. Thematically adjacent to RYOWA through shared construction-industry ecosystem and Japanese regional manufacturing roots, though not a direct MEP competitor.

Direct peers

• Takasago Thermal Engineering Co., Ltd. Japan's leading HVAC and industrial thermal systems contractor with nationwide presence. Directly comparable to RYOWA as a building-equipment specialist focused on air conditioning, ventilation, plumbing, and refrigeration, serving the same end-markets including hospitals, government, and commercial real estate.
• DAI-DAN Co., Ltd. HVAC and building services contractor operating across Japan with strong regional branch networks. Comparable to RYOWA as a multi-branch MEP contractor serving government, healthcare, and commercial segments, though at a larger scale.
• Sanki Engineering Co., Ltd. Major Japanese HVAC, plumbing, and electrical engineering contractor with national coverage across commercial, industrial, and public-sector buildings. Directly comparable as a full-service MEP specialty contractor competing for similar government, healthcare, and commercial project tenders as RYOWA, but at significantly larger national scale.
• Shinryo Corporation: Established Japanese HVAC and clean-room specialist contractor with deep expertise in temperature/humidity-controlled environments. Directly comparable to RYOWA's HVAC and refrigeration focus, particularly relevant for RYOWA's hospital, food/cold-chain, and precision-environment projects.

Others

• Mitsubishi Heavy Industries Thermal Systems, Ltd. Manufacturer of HVAC and refrigeration equipment and RYOWA's exclusive regional sales partner. Included as a strategic ecosystem participant — not a direct competitor — but its distribution decisions directly shape RYOWA's competitive positioning and equipment access.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/ryowasetsubi

Compliance2 records

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 RYOWA