What TSUBASA LTD does

TSUBASA LTD (株式会社ツバサ) is a privately held Japanese comprehensive equipment engineering firm headquartered in Kusatsu City, Shiga Prefecture, founded in October 2019 by Representative Director Reiko Maekawa with registered capital of 1,000,000 JPY. The company delivers B2B equipment construction services across six integrated lines: air conditioning and HVAC for offices, hospitals and public facilities; general electrical work including lighting, wiring, and AV systems; thermal insulation/cold preservation/heat shielding for buildings, factories, and LNG carriers; solar power system design, installation, and maintenance including mega-solar; operations and maintenance outsourcing for power plants; and a proprietary water-treatment product called C-MAKKS, a 100% natural-mineral ceramic filtration media with customizable porous structure for arsenic, heavy-metal, and metal-ion removal from groundwater.

The company's underlying technology combines conventional HVAC/electrical/insulation engineering with proprietary materials science around the C-MAKKS ceramic filter, and its workforce is differentiated by an in-house training pipeline that produces nationally licensed Level 1 Thermal Insulation Construction Technicians. TSUBASA holds a Japanese construction industry permit that allows it to assemble in-house engineers, dedicated external engineers, and partner staff to deliver large-scale or concurrent projects.

TSUBASA makes money primarily through project-based equipment construction contracts across its target segments — offices, factories, hospitals, welfare facilities, public/municipal buildings, commercial spaces, and LNG vessels — supplemented by hardware sales of C-MAKKS filtration media and managed services for power plant O&M. Pricing is fully quote-based and not publicly disclosed. The go-to-market is sales-led with proactive account development, supplemented by a corporate website with detailed service pages, a contact form, phone inquiries, and Google Maps local-search presence targeting the Kansai region of Japan.

Name

TSUBASA LTD

Legal name

株式会社ツバサ

Website

https://tsubasa-ltd.com

Company type

Private

Founded year

2019

Operating status

Operating

Short description

TSUBASA LTD is a Japanese comprehensive equipment engineering firm founded in 2019 that delivers HVAC, electrical, insulation, solar, water-treatment (C-MAKKS ceramic filtration), and power-plant O&M services to offices, factories, hospitals, public facilities, and LNG vessels in the Kansai region.

Ownership category

akta.pro rank

Product category

Building Equipment Construction Services

NAICS

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (3334)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Industrial & Commercial Fans & Blowers & Air Purifing Equip (3564)

akta.pro primary industry

Water Systems & Treatment (Pumps/Boilers/Water Heaters/Filtration) (IMAIABAK)

akta.pro secondary industries

Filtration (Rapid/Slow Sand, Media, Membrane Pretreatment) (EUANABAB), Separation & Filtration Equipment (Filters, Centrifuges, Membranes) (IMAHAEAB)

Keywords

• Equipment construction services
• HVAC installation
• Thermal insulation work
• Solar power systems
• Ceramic water filtration

Headquarters

HQ city

Kusatsu

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Equipment Construction Services: Air conditioning, electrical, insulation, and general facility construction services for offices, factories, hospitals, public facilities, and commercial spaces. Revenue is project-based and likely recognized on completion or over time.
2. Solar Power Generation Systems: Sales, installation, and maintenance of residential and industrial-scale solar photovoltaic systems (including mega-solar facilities). Covers site investigation, planning, design, construction, and post-installation maintenance.
3. Ceramic Filtration Material C-MAKKS: Sale of proprietary ceramic filtration media and related treatment units for water treatment and purification applications. Can be sold as replacement media for existing systems or as integrated C-MAKKS processing units. Some products are regenerable.
4. Power Plant Operations and Maintenance: Operation, operational outsourcing, and maintenance of power plants including hydroelectric, thermal, nuclear, and gas turbine facilities. Also hydrogen-oxygen generating equipment and machinery.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

TSUBASA LTD is a general equipment construction company that designs, installs, and maintains air conditioning, ventilation, water supply and drainage, electrical, and thermal insulation systems for offices, factories, hospitals, public facilities, and commercial buildings. It also sells and installs solar photovoltaic systems (residential through mega-solar scale) and distributes a proprietary ceramic filtration material (C-MAKKS) for water treatment of arsenic, heavy metals, and metal ions in groundwater.

Product overview

株式会社ツバサ is a comprehensive facility equipment engineering company that operates primarily as a service-based business. The company offers six main service areas: (1) C-MAKKS ceramic filtration material for water treatment applications, (2) air conditioning equipment installation and maintenance, (3) electrical equipment work including lighting and audio/visual systems, (4) thermal insulation services for buildings and LNG vessels, (5) solar power generation systems, and (6) integrated facility management services. The portfolio ranges from specialized industrial products like C-MAKKS to traditional construction services including HVAC, electrical, and insulation work.

Differentiator

Problem solved

Functional benefit

Products and services

• C-MAKKS Ceramic Filtration Material

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Organo Corporation: Japanese water-treatment engineering company providing filtration and purification systems for industrial, semiconductor, and municipal applications. Relevant peer to TSUBASA's C-MAKKS water-treatment activity — both target the same end-customers with comparable problem sets (heavy-metal and groundwater treatment).
• Kandenko Co., Ltd. One of Japan's largest electrical infrastructure contractors, providing wiring, lighting, and power systems for commercial buildings, factories, and public facilities — comparable to TSUBASA's electrical equipment business, but at national scale.
• Kyudenko Corporation: Major Japanese electrical construction firm delivering power, lighting, and electrical systems for buildings, factories, and infrastructure. Comparable to TSUBASA's electrical equipment work and solar PV installation capabilities, but operating at much larger scale with diversified service lines.
• Dai-Dan Co., Ltd. Japanese HVAC, industrial ventilation, and coating-systems contractor with strong industrial-factory exposure. Overlaps with TSUBASA on HVAC and electrical work for factories and industrial facilities, and represents the larger incumbent counterpart in plant-side projects.
• Takasago Thermal Engineering Co., Ltd. Major Japanese HVAC, plumbing, and thermal-insulation contractor serving commercial, industrial, and public-sector clients. Comparable to TSUBASA in the breadth of HVAC and insulation services, but operates nationally with established brand and balance sheet.
• Shimizu Corporation: Major Japanese general contractor with comprehensive building-construction services, including MEP work for offices, hospitals, and public facilities. Competes with TSUBASA on integrated facility projects where the general contractor pulls together HVAC, electrical, and insulation scope.
• Sanki Engineering Co., Ltd. One of Japan's largest facility-construction (MEP/HVAC) firms, providing integrated air conditioning, plumbing, electrical, and clean-room work for offices, factories, hospitals, and public facilities — directly comparable to TSUBASA's core service mix, but at much greater scale and with nationwide reach.
• Kurita Water Industries Ltd. Leading Japanese water-treatment solutions provider serving industrial and municipal clients with filtration, purification, and chemical-treatment systems. Comparable to TSUBASA's C-MAKKS water-treatment business from a market and customer perspective, though Kurita operates at enterprise scale with a much broader product portfolio.

Others

• NGK Insulators, Ltd. Major Japanese ceramics manufacturer with industrial filtration, honeycomb substrates, and water-treatment media products. Not a direct competitor to TSUBASA, but a potential technology reference and supplier/adjacent player in the advanced ceramic filtration space where C-MAKKS competes.
• Nippon Steel Engineering & Construction Co., Ltd. Japanese engineering and construction firm with insulation, LNG-tank, and industrial-plant capabilities. Comparable to TSUBASA's LNG-vessel insulation work and broader industrial-facility scope, though at substantially larger scale and with EPC project capability.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 TSUBASA LTD