Sky Group

What Sky Group does

Sky Group is a privately held Japanese enterprise centered on Toa Electric Industry Corporation (株式会社東亜電機工業社), established in 1921 and headquartered in Amagasaki, Hyogo Prefecture, with additional operations in Osaka and Himeji. The group's identity is built on an "energy from entry to exit" environmental philosophy, integrating energy generation (solar and wind power systems), efficient consumption (electric floor-heating systems using proprietary PTC far-infrared film technology with approximately 90% radiation efficiency), and waste recovery (the Ambience microbial food waste disposal system, certified by the Japan Sewage Works Association). Beyond the energy core, subsidiary Toa Non-Wove Machinery Co., Ltd., incorporated in 2011, designs non-woven fabric and bamboo-fiber recycling equipment, and the Direct Current Club (直流倶楽部) initiative, established 2007, advances a distributed-DC electricity lifestyle supported by DC-compatible appliances.

The company operates on a project-based, one-time-sale revenue model combining direct sales to residential and institutional customers (apartments, kindergartens, nursing homes, hospitals) with EPC project execution for larger commercial and government clients, exemplified by a 2.2 MW mega-solar installation at Coca-Cola Bottling Sendai Zao Factory and a 150 kW civic solar project for Fukushima Prefecture. Pricing is quote-based and not publicly disclosed, with sales executed through phone, fax, email, and an Osaka showroom. International engagement centers on a multi-phase renewable-energy collaboration with the Mongolia Government (signed 2010, Phase 2 in 2014) targeting underserved nomadic and rural communities.

Customer segments span residential homeowners, elderly care and welfare facilities, educational institutions, commercial offices, and industrial/Manufacturing clients, plus a stated interest in off-grid rural markets in developing countries. Distribution is fully direct, with no third-party channels evident in the source material. Ownership appears concentrated with the founding family and led by representative director Aso Yoshitsugu; no private equity, venture capital, or institutional investor involvement is disclosed. The group is small (11-50 employees), privately held, and self-financed, with no funding rounds on record.

Name

Sky Group

Legal name

株式会社東亜電機工業社

Website

https://sky-gr.co.jp

Company type

Private

Founded year

1921

Operating status

Operating

Headcount range

11–50 employees

Short description

Sky Group is a 1921-founded Japanese energy and environmental technology group centered on Toa Electric Industry Corporation, selling proprietary PTC far-infrared floor heating, solar and wind generation systems, the Ambience microbial food waste disposer, and non-woven recycling machinery to residential, institutional, and industrial customers in Japan and Mongolia.

Ownership category

akta.pro rank

Product category

Floor Heating and Energy Solutions

NAICS

Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512), Electric Lighting Equipment Manufacturing (33513)

SIC

Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Electric Lighting & Wiring Equipment (3640), Electric Housewares & Fans (3634)

akta.pro primary industry

HVAC Equipment (Heating, Cooling & Air Handling) (IMAHAKAB)

akta.pro secondary industries

Energy Storage Components for Renewables Manufacturing (BESS Packs, PCS, Thermal Management) (EUAMAHAI), Renewable Monitoring, Controls & SCADA Hardware Manufacturing (Sensors, RTUs, Meters) (EUAMAHAJ), Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging) (IMAFALAJ), Ventilation, Ducting & Air Distribution Equipment (IMAHAKAG)

Keywords

• Floor heating systems
• Renewable energy solutions
• Food waste disposal
• Solar power installation
• Electrical construction services

Headquarters

HQ city

Osaka

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Electrical Construction Services: Electrical contracting work including installation of floor heating systems, electrical wiring, and renovation projects for residential and commercial buildings.
2. Floor Heating Systems: Sale and installation of various floor heating systems including PTC film, storage-type, and non-storage concrete-embedded systems for homes, apartments, and facilities.
3. Solar and Wind Power Equipment: Installation of solar panels and wind turbines for residential, commercial, and industrial applications including mega-solar installations.
4. Food Waste Disposal Systems: Ambience brand garbage disposal units with microbial processing systems for household and commercial kitchen use.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Sky Group, through its central company Toa Electric Industry Corporation, designs, manufactures, sells, and installs energy-efficient floor heating systems (PTC far-infrared film and heat-storage variants), the Ambience microbial food waste disposal system, solar and wind power generation systems, DC electricity lifestyle products (DC Club), and provides electrical contracting services for residential, commercial, and institutional customers in Japan.

Product overview

Sky Group (株式会社東亜電機工業社), founded in 1921, is a Japanese energy solutions company organized as a group structure. The core product portfolio centers on PTC床暖房 (PTC Film Floor Heating) systems, including various types such as 蓄熱式 (heat storage) and 非蓄熱式 (non-storage) variants, plus OAフロア用パネル床暖房 (OA floor panel heating). The company also offers アンビエンス (Ambience), a certified food waste disposal system using shock hammer grinding and microbial decomposition. Supporting products include 省エネランプ (energy-saving lamps), 空調機の省エネ (Be Next air conditioning control), and 太陽光・風力発電 (solar/wind power generation) systems. The subsidiary 東亜ノンウーヴェンマシナリー provides non-woven fabric manufacturing equipment including マットフォーマーⅡ and バンオプナー. An initiative called 直流俱楽 部 (DC Club) promotes direct current power lifestyle products. The group operates primarily from Osaka, Japan, with an office in Himeji, and has conducted international projects in Mongolia and other developing regions.

Differentiator

Problem solved

Functional benefit

Brands

• 直流俱楽部 (Direct Current Club): An initiative/advocacy group promoting small-scale distributed DC power generation using solar and wind renewable energy as a sustainable alternative to centralized AC power systems.
• Be Next
• アンビエンス (Ambience)

Products and services

• PTC Film Floor Heating System (PTC床暖房 / PTCフィルム式床暖房) Far-infrared film floor heating system using self-regulating PTC (Positive Temperature Coefficient) carbon-based heating elements that increase electrical resistance with temperature, preventing overheating. Only 0.25 mm thick, with ~90% far-infrared radiation efficiency and ~60% electrical usage rate after reaching set temperature. Sold and installed for homes, apartments, and institutional buildings.
• Sensible Heat Storage Floor Heating System (顕熱蓄熱式電気床暖房システム) Heat storage electric floor heating that leverages the sensible heat capacity of mortar/concrete to store thermal energy during off-peak hours and release heat during the day, optimizing off-peak electricity usage.
• Combined Latent and Sensible Heat Storage Floor Heating System (潜熱＋顕熱蓄熱式電気床暖房システム) Combined latent and sensible heat storage floor heating system using phase-change materials alongside concrete to enhance thermal storage capacity beyond sensible-only systems.
• Latent Heat Storage Floor Heating System (潜熱蓄熱式電気床暖房システム) Latent heat storage electric floor heating system designed for wooden floor structures, suitable for residential homes, kindergartens, schools, and welfare facilities.
• Concrete-Embedded Non-Heat-Storage Floor Heating System (コンクリート埋設型非蓄熱式電気床暖房システム) Non-heat-storage electric floor heating with heating cables embedded in concrete; the most economical floor heating option, intended for bathrooms and wet areas.
• Panel-Style Electric Floor Heating System (パネル式電気床暖房システム) Panel-style electric floor heating available in multiple sizes with connector joints at every seam for simplified and reliable installation.
• OA Floor Panel Heating (OAフロア用パネル床暖房) Electric floor heating integrated into OA floor panels, compatible with multiple OA floor brands (Itoki, Panasonic, Nakakougyou, Hitachi-zairai, Fukuvi Chemical); designed for offices and stores.
• Ambience Food Waste Disposer System (アンビエンス ディスポーザ生ゴミ処理システム) Certified household food waste disposer using shock hammer grinding (no blades) followed by a two-tank microbial decomposition process that discharges clean water to sewer. Certified by the Japan Sewage Works Association. Approximately 375 yen monthly running cost.
• Solar and Wind Power Generation Systems (太陽光・風力発電システム) Design, supply and installation of solar and wind power generation systems for residential, commercial, and industrial-scale projects, including mega-solar installations; serves customers ranging from individual homeowners to large factories and government facilities.
• Be Next Air Conditioning Energy Saving System (空調機の省エネ Be Next) Add-on energy saving system that automatically controls compressor operation based on real-time air conditioner and freezer operating conditions to reduce electricity consumption.
• Sky-Line Energy-Saving Lamps (省エネランプ Sky-Line) Energy-saving lamps sold as part of Sky Group's energy efficiency product portfolio for household and commercial lighting.
• DC Club Direct Current Lifestyle Products (直流倶楽部 直流製品) DC-compatible appliances (TVs, lighting, refrigerators, fans, computers) marketed through the Direct Current Club (直流倶楽部) initiative that runs directly on solar/wind-generated DC power, eliminating AC/DC conversion losses and supporting off-grid and sustainable energy use.
• Mat Former II Fiber Recycling Device (マットフォーマーⅡ) Fiber recycling device that regenerates short-fiber textile waste into nonwoven mats; manufactured by Sky Group subsidiary Toa Non-Wove Machinery Co., Ltd.
• Bamboo Opener Nonwoven Device (バンオープナー) Nonwoven fabric manufacturing device that produces nonwoven fabric from bamboo feedstock; manufactured by Sky Group subsidiary Toa Non-Wove Machinery Co., Ltd.
• Electrical Construction and Installation Services (電気工事業) Electrical contracting and installation services bundled with product sales, including wiring, floor heating installation, renovation, and large-scale renewable energy construction. Provided directly by Toa Electric Industry Corporation for residential and commercial/institutional customers.

Quantifiable outcome

• PTC floor heating achieves 60% electrical usage rate after reaching set temperature through automatic cycling control
• +2 more outcomes

Named customers2 records

Segments6 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered major.

• Mongolia Government - Second Phase ProjectmajorStrategic or Co-development Partner · 5 February 2014Second phase of the Mongolia project following the initial 2010 agreement. The project continues providing renewable energy solutions to Mongolian communities.
• Mongolia GovernmentmajorStrategic or Co-development Partner · 30 September 2010Sky Group (Toa Electric Industry Corporation) signed a next-generation collaborative project agreement with the Mongolian Government in September 2010. The partnership aims to provide renewable energy solutions including solar and wind power systems to underserved areas of Mongolia, including nomadic communities. This follows earlier Mongolia projects started in 2014.

Scale indicators1 record

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Panasonic Corporation: Global electronics/HVAC major offering floor heating, heat pumps, solar PV, and residential energy management. Overlaps substantially across Sky Group's product range with vastly greater scale, distribution, and R&D resources.
• Sharp Corporation: Japanese electronics and energy major with significant residential solar PV and energy storage offerings. Competes in Sky Group's solar installation segment through roof-top PV systems and battery products.
• Sekisui Chemical Co., Ltd. Major Japanese diversified manufacturer whose housing division offers floor heating systems, solar panels, and energy-efficient home solutions. Competes across multiple Sky Group product lines but as part of a much broader housing materials portfolio.
• Daikin Industries, Ltd. World-leading HVAC manufacturer with growing presence in heat pump heating, hot-water floor heating, and energy-saving controls. Competes in the residential and commercial heating segment with much larger technology and distribution footprint.

Direct peers

• Maruwa Onden (丸和電機): Japanese manufacturer of electric floor heating systems and snow-melting heaters, with a strong presence in cold-climate Hokkaido and Tohoku regions. Direct competitor in film/cable floor heating targeting homes and commercial facilities.
• Tokyo Denki Ondan (東京電気暖房): Long-standing Japanese electric floor heating specialist producing film-type and cable-type systems for residential and commercial use. Direct competitor in PTC/film floor heating serving similar residential, education, and care-facility segments.
• Uponor Corporation: Global leader in radiant floor heating (hydronic) and plumbing systems with strong presence in European and North American markets. Comparable as a floor heating specialist, though primarily hydronic rather than electric/PTC like Sky Group.
• BioGreen LLC (Bio Invigor): Manufacturer of food waste disposers and microbial decomposition systems for residential and commercial use. Directly comparable to Sky Group's Ambience system in the certified food waste processing category.

Emerging players

• Maxell, Ltd. (formerly Hitachi Maxell): Japanese manufacturer with battery storage and DC power technology offerings relevant to Sky Group's DC Club ecosystem. Comparable as a potential partner/competitor in residential DC appliances and energy storage components.

Regional players

• Maezawa Industries, Inc. Japanese manufacturer of water/wastewater and environmental equipment including food waste processing machinery. Comparable to the Ambience disposer from a municipal/industrial environmental equipment angle, primarily serving the Japanese market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries2 records

Funding overview

Funding rounds

Investors

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

M&A

Investments1 record

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

Frequently asked questions about Sky Group